Finding the Fourth Proportional to 42,131.64, 58,139.28 and 25,155.06

Step by Step Solution

1. Step 1: Write the proportion equation
   42,131.64 : 58,139.28 = 25,155.06 : x
2. Step 2: Convert to fraction form
   42,131.64/58,139.28 = 25,155.06/x
3. Step 3: Cross multiply
   42,131.64x = 58,139.28 × 25,155.06
4. Step 4: Simplify right side
   42,131.64x = 1,462,497,076.76
5. Step 5: Solve for x
   x = 1,462,497,076.76/42,131.64
6. Step 6: Final answer
   x = 34,712.56