Finding the Fourth Proportional to 42,521.33, 58,687.55 and 28,155.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,521.33 : 58,687.55 = 28,155.82 : x
2. Step 2: Convert to fraction form
   42,521.33/58,687.55 = 28,155.82/x
3. Step 3: Cross multiply
   42,521.33x = 58,687.55 × 28,155.82
4. Step 4: Simplify right side
   42,521.33x = 1,652,396,017.71
5. Step 5: Solve for x
   x = 1,652,396,017.71/42,521.33
6. Step 6: Final answer
   x = 38,860.41