Finding the Fourth Proportional to 271,018.72, 406,311 and 128,792.62

Step by Step Solution

1. Step 1: Write the proportion equation
   271,018.72 : 406,311 = 128,792.62 : x
2. Step 2: Convert to fraction form
   271,018.72/406,311 = 128,792.62/x
3. Step 3: Cross multiply
   271,018.72x = 406,311 × 128,792.62
4. Step 4: Simplify right side
   271,018.72x = 52,329,858,224.82
5. Step 5: Solve for x
   x = 52,329,858,224.82/271,018.72
6. Step 6: Final answer
   x = 193,085.77