Finding the Fourth Proportional to 28,513.17, 42,762.42 and 13,505.49

Step by Step Solution

1. Step 1: Write the proportion equation
   28,513.17 : 42,762.42 = 13,505.49 : x
2. Step 2: Convert to fraction form
   28,513.17/42,762.42 = 13,505.49/x
3. Step 3: Cross multiply
   28,513.17x = 42,762.42 × 13,505.49
4. Step 4: Simplify right side
   28,513.17x = 577,527,435.69
5. Step 5: Solve for x
   x = 577,527,435.69/28,513.17
6. Step 6: Final answer
   x = 20,254.76