Finding the Fourth Proportional to 9,168.64, 12,650.58 and 5,188.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.64 : 12,650.58 = 5,188.88 : x
2. Step 2: Convert to fraction form
   9,168.64/12,650.58 = 5,188.88/x
3. Step 3: Cross multiply
   9,168.64x = 12,650.58 × 5,188.88
4. Step 4: Simplify right side
   9,168.64x = 65,642,341.55
5. Step 5: Solve for x
   x = 65,642,341.55/9,168.64
6. Step 6: Final answer
   x = 7,159.44