Finding the Fourth Proportional to 28,499.12, 42,749.41 and 13,502.73

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.12 : 42,749.41 = 13,502.73 : x
2. Step 2: Convert to fraction form
   28,499.12/42,749.41 = 13,502.73/x
3. Step 3: Cross multiply
   28,499.12x = 42,749.41 × 13,502.73
4. Step 4: Simplify right side
   28,499.12x = 577,233,740.89
5. Step 5: Solve for x
   x = 577,233,740.89/28,499.12
6. Step 6: Final answer
   x = 20,254.44