Finding the Fourth Proportional to 5,134.50, 7,123.46 and 5,085.90

Step by Step Solution

1. Step 1: Write the proportion equation
   5,134.50 : 7,123.46 = 5,085.90 : x
2. Step 2: Convert to fraction form
   5,134.50/7,123.46 = 5,085.90/x
3. Step 3: Cross multiply
   5,134.50x = 7,123.46 × 5,085.90
4. Step 4: Simplify right side
   5,134.50x = 36,229,179.78
5. Step 5: Solve for x
   x = 36,229,179.78/5,134.50
6. Step 6: Final answer
   x = 7,056.03