Finding the Fourth Proportional to 71,436.28, 107,146.89 and 29,320.80

Step by Step Solution

1. Step 1: Write the proportion equation
   71,436.28 : 107,146.89 = 29,320.80 : x
2. Step 2: Convert to fraction form
   71,436.28/107,146.89 = 29,320.80/x
3. Step 3: Cross multiply
   71,436.28x = 107,146.89 × 29,320.80
4. Step 4: Simplify right side
   71,436.28x = 3,141,632,532.31
5. Step 5: Solve for x
   x = 3,141,632,532.31/71,436.28
6. Step 6: Final answer
   x = 43,978.11