Finding the Fourth Proportional to 28,081.52, 38,751.98 and 15,506

Step by Step Solution

1. Step 1: Write the proportion equation
   28,081.52 : 38,751.98 = 15,506 : x
2. Step 2: Convert to fraction form
   28,081.52/38,751.98 = 15,506/x
3. Step 3: Cross multiply
   28,081.52x = 38,751.98 × 15,506
4. Step 4: Simplify right side
   28,081.52x = 600,888,201.88
5. Step 5: Solve for x
   x = 600,888,201.88/28,081.52
6. Step 6: Final answer
   x = 21,397.99