Finding the Third Proportional to 12,151,660.50 and 28,685,139

Step by Step Solution

1. Step 1: Write the proportion equation
   12,151,660.50 : 28,685,139 = 28,685,139 : x
2. Step 2: Convert to fraction form
   12,151,660.50/28,685,139 = 28,685,139/x
3. Step 3: Cross multiply
   12,151,660.50x = 28,685,139 × 28,685,139
4. Step 4: Simplify right side
   12,151,660.50x = 822,837,199,449,321
5. Step 5: Solve for x
   x = 822,837,199,449,321/12,151,660.50
6. Step 6: Final answer
   x = 67,713,972.05