Finding the Fourth Proportional to 28,499.86, 39,328.59 and 15,752.39

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.86 : 39,328.59 = 15,752.39 : x
2. Step 2: Convert to fraction form
   28,499.86/39,328.59 = 15,752.39/x
3. Step 3: Cross multiply
   28,499.86x = 39,328.59 × 15,752.39
4. Step 4: Simplify right side
   28,499.86x = 619,519,287.83
5. Step 5: Solve for x
   x = 619,519,287.83/28,499.86
6. Step 6: Final answer
   x = 21,737.63