Finding the Fourth Proportional to 28,829.52, 39,784.72 and 15,581.52

Step by Step Solution

1. Step 1: Write the proportion equation
   28,829.52 : 39,784.72 = 15,581.52 : x
2. Step 2: Convert to fraction form
   28,829.52/39,784.72 = 15,581.52/x
3. Step 3: Cross multiply
   28,829.52x = 39,784.72 × 15,581.52
4. Step 4: Simplify right side
   28,829.52x = 619,906,410.37
5. Step 5: Solve for x
   x = 619,906,410.37/28,829.52
6. Step 6: Final answer
   x = 21,502.49