Finding the Fourth Proportional to 9,115.32, 12,576.42 and 5,574.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,115.32 : 12,576.42 = 5,574.81 : x
2. Step 2: Convert to fraction form
   9,115.32/12,576.42 = 5,574.81/x
3. Step 3: Cross multiply
   9,115.32x = 12,576.42 × 5,574.81
4. Step 4: Simplify right side
   9,115.32x = 70,111,151.98
5. Step 5: Solve for x
   x = 70,111,151.98/9,115.32
6. Step 6: Final answer
   x = 7,691.57