Finding the Fourth Proportional to 31,039.55, 42,877.80 and 29,887.39

Step by Step Solution

1. Step 1: Write the proportion equation
   31,039.55 : 42,877.80 = 29,887.39 : x
2. Step 2: Convert to fraction form
   31,039.55/42,877.80 = 29,887.39/x
3. Step 3: Cross multiply
   31,039.55x = 42,877.80 × 29,887.39
4. Step 4: Simplify right side
   31,039.55x = 1,281,505,423.75
5. Step 5: Solve for x
   x = 1,281,505,423.75/31,039.55
6. Step 6: Final answer
   x = 41,286.22