Finding the Third Proportional to 7,836,129 and 12,108,811.50

Step by Step Solution

1. Step 1: Write the proportion equation
   7,836,129 : 12,108,811.50 = 12,108,811.50 : x
2. Step 2: Convert to fraction form
   7,836,129/12,108,811.50 = 12,108,811.50/x
3. Step 3: Cross multiply
   7,836,129x = 12,108,811.50 × 12,108,811.50
4. Step 4: Simplify right side
   7,836,129x = 146,623,315,942,532.25
5. Step 5: Solve for x
   x = 146,623,315,942,532.25/7,836,129
6. Step 6: Final answer
   x = 18,711,192.22