Finding the Fourth Proportional to 42,940.48, 59,262.72 and 28,599.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,940.48 : 59,262.72 = 28,599.52 : x
2. Step 2: Convert to fraction form
   42,940.48/59,262.72 = 28,599.52/x
3. Step 3: Cross multiply
   42,940.48x = 59,262.72 × 28,599.52
4. Step 4: Simplify right side
   42,940.48x = 1,694,885,345.89
5. Step 5: Solve for x
   x = 1,694,885,345.89/42,940.48
6. Step 6: Final answer
   x = 39,470.57