Finding the Fourth Proportional to 9,404.04, 12,947.98 and 7,158.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,404.04 : 12,947.98 = 7,158.72 : x
2. Step 2: Convert to fraction form
   9,404.04/12,947.98 = 7,158.72/x
3. Step 3: Cross multiply
   9,404.04x = 12,947.98 × 7,158.72
4. Step 4: Simplify right side
   9,404.04x = 92,690,963.39
5. Step 5: Solve for x
   x = 92,690,963.39/9,404.04
6. Step 6: Final answer
   x = 9,856.50