Finding the Fourth Proportional to 9,110.40, 12,572.42 and 5,131.14

Step by Step Solution

1. Step 1: Write the proportion equation
   9,110.40 : 12,572.42 = 5,131.14 : x
2. Step 2: Convert to fraction form
   9,110.40/12,572.42 = 5,131.14/x
3. Step 3: Cross multiply
   9,110.40x = 12,572.42 × 5,131.14
4. Step 4: Simplify right side
   9,110.40x = 64,510,847.16
5. Step 5: Solve for x
   x = 64,510,847.16/9,110.40
6. Step 6: Final answer
   x = 7,081.01