Finding the Fourth Proportional to 12,914,140, 17,821,513.20 and 7,484,781.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,914,140 : 17,821,513.20 = 7,484,781.28 : x
2. Step 2: Convert to fraction form
   12,914,140/17,821,513.20 = 7,484,781.28/x
3. Step 3: Cross multiply
   12,914,140x = 17,821,513.20 × 7,484,781.28
4. Step 4: Simplify right side
   12,914,140x = 133,390,128,380,632.89
5. Step 5: Solve for x
   x = 133,390,128,380,632.89/12,914,140
6. Step 6: Final answer
   x = 10,328,998.17