Finding the Fourth Proportional to 9,110.31, 12,572.27 and 5,131.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,110.31 : 12,572.27 = 5,131.48 : x
2. Step 2: Convert to fraction form
   9,110.31/12,572.27 = 5,131.48/x
3. Step 3: Cross multiply
   9,110.31x = 12,572.27 × 5,131.48
4. Step 4: Simplify right side
   9,110.31x = 64,514,352.06
5. Step 5: Solve for x
   x = 64,514,352.06/9,110.31
6. Step 6: Final answer
   x = 7,081.47