Finding the Fourth Proportional to 71,892.72, 107,839.15 and 71,788.89

Step by Step Solution

1. Step 1: Write the proportion equation
   71,892.72 : 107,839.15 = 71,788.89 : x
2. Step 2: Convert to fraction form
   71,892.72/107,839.15 = 71,788.89/x
3. Step 3: Cross multiply
   71,892.72x = 107,839.15 × 71,788.89
4. Step 4: Simplify right side
   71,892.72x = 7,741,652,528.59
5. Step 5: Solve for x
   x = 7,741,652,528.59/71,892.72
6. Step 6: Final answer
   x = 107,683.40