Finding the Fourth Proportional to 42,706.28, 58,959.25 and 28,385.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,706.28 : 58,959.25 = 28,385.52 : x
2. Step 2: Convert to fraction form
   42,706.28/58,959.25 = 28,385.52/x
3. Step 3: Cross multiply
   42,706.28x = 58,959.25 × 28,385.52
4. Step 4: Simplify right side
   42,706.28x = 1,673,588,899.10
5. Step 5: Solve for x
   x = 1,673,588,899.10/42,706.28
6. Step 6: Final answer
   x = 39,188.36