Finding the Fourth Proportional to 10,488.61, 15,728.31 and 5,557.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488.61 : 15,728.31 = 5,557.12 : x
2. Step 2: Convert to fraction form
   10,488.61/15,728.31 = 5,557.12/x
3. Step 3: Cross multiply
   10,488.61x = 15,728.31 × 5,557.12
4. Step 4: Simplify right side
   10,488.61x = 87,404,106.07
5. Step 5: Solve for x
   x = 87,404,106.07/10,488.61
6. Step 6: Final answer
   x = 8,333.24