Finding the Fourth Proportional to 9,178.52, 12,666.71 and 5,199.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,178.52 : 12,666.71 = 5,199.56 : x
2. Step 2: Convert to fraction form
   9,178.52/12,666.71 = 5,199.56/x
3. Step 3: Cross multiply
   9,178.52x = 12,666.71 × 5,199.56
4. Step 4: Simplify right side
   9,178.52x = 65,861,315.81
5. Step 5: Solve for x
   x = 65,861,315.81/9,178.52
6. Step 6: Final answer
   x = 7,175.60