Finding the Fourth Proportional to 7,123.55, 10,687.48 and 5,047.57

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.55 : 10,687.48 = 5,047.57 : x
2. Step 2: Convert to fraction form
   7,123.55/10,687.48 = 5,047.57/x
3. Step 3: Cross multiply
   7,123.55x = 10,687.48 × 5,047.57
4. Step 4: Simplify right side
   7,123.55x = 53,945,803.42
5. Step 5: Solve for x
   x = 53,945,803.42/7,123.55
6. Step 6: Final answer
   x = 7,572.88