Finding the Fourth Proportional to 5,529.42, 8,312.36 and 5,123.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,529.42 : 8,312.36 = 5,123.61 : x
2. Step 2: Convert to fraction form
   5,529.42/8,312.36 = 5,123.61/x
3. Step 3: Cross multiply
   5,529.42x = 8,312.36 × 5,123.61
4. Step 4: Simplify right side
   5,529.42x = 42,589,290.82
5. Step 5: Solve for x
   x = 42,589,290.82/5,529.42
6. Step 6: Final answer
   x = 7,702.31