Finding the Fourth Proportional to 9,382.72, 12,948.40 and 5,191.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,382.72 : 12,948.40 = 5,191.04 : x
2. Step 2: Convert to fraction form
   9,382.72/12,948.40 = 5,191.04/x
3. Step 3: Cross multiply
   9,382.72x = 12,948.40 × 5,191.04
4. Step 4: Simplify right side
   9,382.72x = 67,215,662.34
5. Step 5: Solve for x
   x = 67,215,662.34/9,382.72
6. Step 6: Final answer
   x = 7,163.77