Finding the Fourth Proportional to 42,132.34, 58,151.73 and 28,735.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,132.34 : 58,151.73 = 28,735.57 : x
2. Step 2: Convert to fraction form
   42,132.34/58,151.73 = 28,735.57/x
3. Step 3: Cross multiply
   42,132.34x = 58,151.73 × 28,735.57
4. Step 4: Simplify right side
   42,132.34x = 1,671,023,108.04
5. Step 5: Solve for x
   x = 1,671,023,108.04/42,132.34
6. Step 6: Final answer
   x = 39,661.29