Finding the Fourth Proportional to 9,131.67, 12,601.88 and 5,357.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.67 : 12,601.88 = 5,357.72 : x
2. Step 2: Convert to fraction form
   9,131.67/12,601.88 = 5,357.72/x
3. Step 3: Cross multiply
   9,131.67x = 12,601.88 × 5,357.72
4. Step 4: Simplify right side
   9,131.67x = 67,517,254.72
5. Step 5: Solve for x
   x = 67,517,254.72/9,131.67
6. Step 6: Final answer
   x = 7,393.75