Finding the Fourth Proportional to 9,102.18, 12,560.47 and 5,123.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.18 : 12,560.47 = 5,123.05 : x
2. Step 2: Convert to fraction form
   9,102.18/12,560.47 = 5,123.05/x
3. Step 3: Cross multiply
   9,102.18x = 12,560.47 × 5,123.05
4. Step 4: Simplify right side
   9,102.18x = 64,347,915.83
5. Step 5: Solve for x
   x = 64,347,915.83/9,102.18
6. Step 6: Final answer
   x = 7,069.51