Finding the Third Proportional to 12,280,887,832.50 and 18,864,946,141.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,280,887,832.50 : 18,864,946,141.50 = 18,864,946,141.50 : x
2. Step 2: Convert to fraction form
   12,280,887,832.50/18,864,946,141.50 = 18,864,946,141.50/x
3. Step 3: Cross multiply
   12,280,887,832.50x = 18,864,946,141.50 × 18,864,946,141.50
4. Step 4: Simplify right side
   12,280,887,832.50x = 355,886,192,921,695,748,096
5. Step 5: Solve for x
   x = 355,886,192,921,695,748,096/12,280,887,832.50
6. Step 6: Final answer
   x = 28,978,865,190.83