Finding the Fourth Proportional to 10,272.81, 14,176.58 and 5,557.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,272.81 : 14,176.58 = 5,557.20 : x
2. Step 2: Convert to fraction form
   10,272.81/14,176.58 = 5,557.20/x
3. Step 3: Cross multiply
   10,272.81x = 14,176.58 × 5,557.20
4. Step 4: Simplify right side
   10,272.81x = 78,782,090.38
5. Step 5: Solve for x
   x = 78,782,090.38/10,272.81
6. Step 6: Final answer
   x = 7,668.99