Finding the Fourth Proportional to 12,542.73, 18,821.40 and 4,752.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,542.73 : 18,821.40 = 4,752.15 : x
2. Step 2: Convert to fraction form
   12,542.73/18,821.40 = 4,752.15/x
3. Step 3: Cross multiply
   12,542.73x = 18,821.40 × 4,752.15
4. Step 4: Simplify right side
   12,542.73x = 89,442,116.01
5. Step 5: Solve for x
   x = 89,442,116.01/12,542.73
6. Step 6: Final answer
   x = 7,130.99