Finding the Fourth Proportional to 9,179.12, 12,666.78 and 5,200.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,179.12 : 12,666.78 = 5,200.15 : x
2. Step 2: Convert to fraction form
   9,179.12/12,666.78 = 5,200.15/x
3. Step 3: Cross multiply
   9,179.12x = 12,666.78 × 5,200.15
4. Step 4: Simplify right side
   9,179.12x = 65,869,156.02
5. Step 5: Solve for x
   x = 65,869,156.02/9,179.12
6. Step 6: Final answer
   x = 7,175.98