Finding the Fourth Proportional to 10,272.87, 14,176.54 and 5,557.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,272.87 : 14,176.54 = 5,557.15 : x
2. Step 2: Convert to fraction form
   10,272.87/14,176.54 = 5,557.15/x
3. Step 3: Cross multiply
   10,272.87x = 14,176.54 × 5,557.15
4. Step 4: Simplify right side
   10,272.87x = 78,781,159.26
5. Step 5: Solve for x
   x = 78,781,159.26/10,272.87
6. Step 6: Final answer
   x = 7,668.86