Finding the Fourth Proportional to 9,102.29, 12,560.94 and 5,123.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.29 : 12,560.94 = 5,123.30 : x
2. Step 2: Convert to fraction form
   9,102.29/12,560.94 = 5,123.30/x
3. Step 3: Cross multiply
   9,102.29x = 12,560.94 × 5,123.30
4. Step 4: Simplify right side
   9,102.29x = 64,353,401.10
5. Step 5: Solve for x
   x = 64,353,401.10/9,102.29
6. Step 6: Final answer
   x = 7,070.03