Finding the Fourth Proportional to 42,128.78, 58,136.91 and 23,265.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.78 : 58,136.91 = 23,265.50 : x
2. Step 2: Convert to fraction form
   42,128.78/58,136.91 = 23,265.50/x
3. Step 3: Cross multiply
   42,128.78x = 58,136.91 × 23,265.50
4. Step 4: Simplify right side
   42,128.78x = 1,352,584,279.61
5. Step 5: Solve for x
   x = 1,352,584,279.61/42,128.78
6. Step 6: Final answer
   x = 32,105.94