Finding the Fourth Proportional to 9,406.92, 12,988.98 and 7,635.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,406.92 : 12,988.98 = 7,635.72 : x
2. Step 2: Convert to fraction form
   9,406.92/12,988.98 = 7,635.72/x
3. Step 3: Cross multiply
   9,406.92x = 12,988.98 × 7,635.72
4. Step 4: Simplify right side
   9,406.92x = 99,180,214.37
5. Step 5: Solve for x
   x = 99,180,214.37/9,406.92
6. Step 6: Final answer
   x = 10,543.32