Finding the Fourth Proportional to 42,151.40, 58,101.36 and 28,535.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42,151.40 : 58,101.36 = 28,535.15 : x
2. Step 2: Convert to fraction form
   42,151.40/58,101.36 = 28,535.15/x
3. Step 3: Cross multiply
   42,151.40x = 58,101.36 × 28,535.15
4. Step 4: Simplify right side
   42,151.40x = 1,657,930,803.64
5. Step 5: Solve for x
   x = 1,657,930,803.64/42,151.40
6. Step 6: Final answer
   x = 39,332.76