Finding the Fourth Proportional to 6,123.57, 8,443.13 and 5,177.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,123.57 : 8,443.13 = 5,177.69 : x
2. Step 2: Convert to fraction form
   6,123.57/8,443.13 = 5,177.69/x
3. Step 3: Cross multiply
   6,123.57x = 8,443.13 × 5,177.69
4. Step 4: Simplify right side
   6,123.57x = 43,715,909.77
5. Step 5: Solve for x
   x = 43,715,909.77/6,123.57
6. Step 6: Final answer
   x = 7,138.96