Finding the Fourth Proportional to 9,102.17, 12,561.04 and 5,123.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.17 : 12,561.04 = 5,123.35 : x
2. Step 2: Convert to fraction form
   9,102.17/12,561.04 = 5,123.35/x
3. Step 3: Cross multiply
   9,102.17x = 12,561.04 × 5,123.35
4. Step 4: Simplify right side
   9,102.17x = 64,354,626.39
5. Step 5: Solve for x
   x = 64,354,626.39/9,102.17
6. Step 6: Final answer
   x = 7,070.25