Finding the Fourth Proportional to 9,417.76, 12,996.98 and 5,168.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,417.76 : 12,996.98 = 5,168.78 : x
2. Step 2: Convert to fraction form
   9,417.76/12,996.98 = 5,168.78/x
3. Step 3: Cross multiply
   9,417.76x = 12,996.98 × 5,168.78
4. Step 4: Simplify right side
   9,417.76x = 67,178,549.85
5. Step 5: Solve for x
   x = 67,178,549.85/9,417.76
6. Step 6: Final answer
   x = 7,133.18