Finding the Fourth Proportional to 9,102.30, 12,561.22 and 5,123.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.30 : 12,561.22 = 5,123.48 : x
2. Step 2: Convert to fraction form
   9,102.30/12,561.22 = 5,123.48/x
3. Step 3: Cross multiply
   9,102.30x = 12,561.22 × 5,123.48
4. Step 4: Simplify right side
   9,102.30x = 64,357,159.45
5. Step 5: Solve for x
   x = 64,357,159.45/9,102.30
6. Step 6: Final answer
   x = 7,070.43