Finding the Fourth Proportional to 42,123.75, 58,138.20 and 25,129.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,123.75 : 58,138.20 = 25,129.05 : x
2. Step 2: Convert to fraction form
   42,123.75/58,138.20 = 25,129.05/x
3. Step 3: Cross multiply
   42,123.75x = 58,138.20 × 25,129.05
4. Step 4: Simplify right side
   42,123.75x = 1,460,957,734.71
5. Step 5: Solve for x
   x = 1,460,957,734.71/42,123.75
6. Step 6: Final answer
   x = 34,682.52