Finding the Fourth Proportional to 28,503.20, 42,764.02 and 13,710.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,503.20 : 42,764.02 = 13,710.18 : x
2. Step 2: Convert to fraction form
   28,503.20/42,764.02 = 13,710.18/x
3. Step 3: Cross multiply
   28,503.20x = 42,764.02 × 13,710.18
4. Step 4: Simplify right side
   28,503.20x = 586,302,411.72
5. Step 5: Solve for x
   x = 586,302,411.72/28,503.20
6. Step 6: Final answer
   x = 20,569.70