Finding the Fourth Proportional to 9,102.56, 12,561.56 and 5,123.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.56 : 12,561.56 = 5,123.73 : x
2. Step 2: Convert to fraction form
   9,102.56/12,561.56 = 5,123.73/x
3. Step 3: Cross multiply
   9,102.56x = 12,561.56 × 5,123.73
4. Step 4: Simplify right side
   9,102.56x = 64,362,016.20
5. Step 5: Solve for x
   x = 64,362,016.20/9,102.56
6. Step 6: Final answer
   x = 7,070.76