Finding the Fourth Proportional to 10,488.69, 15,728.38 and 5,557.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,488.69 : 15,728.38 = 5,557.14 : x
2. Step 2: Convert to fraction form
   10,488.69/15,728.38 = 5,557.14/x
3. Step 3: Cross multiply
   10,488.69x = 15,728.38 × 5,557.14
4. Step 4: Simplify right side
   10,488.69x = 87,404,795.74
5. Step 5: Solve for x
   x = 87,404,795.74/10,488.69
6. Step 6: Final answer
   x = 8,333.24