Finding the Fourth Proportional to 42,661.10, 58,876.54 and 31,887.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,661.10 : 58,876.54 = 31,887.30 : x
2. Step 2: Convert to fraction form
   42,661.10/58,876.54 = 31,887.30/x
3. Step 3: Cross multiply
   42,661.10x = 58,876.54 × 31,887.30
4. Step 4: Simplify right side
   42,661.10x = 1,877,413,893.94
5. Step 5: Solve for x
   x = 1,877,413,893.94/42,661.10
6. Step 6: Final answer
   x = 44,007.63