Finding the Fourth Proportional to 9,102.14, 12,560.88 and 5,123.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,102.14 : 12,560.88 = 5,123.42 : x
2. Step 2: Convert to fraction form
   9,102.14/12,560.88 = 5,123.42/x
3. Step 3: Cross multiply
   9,102.14x = 12,560.88 × 5,123.42
4. Step 4: Simplify right side
   9,102.14x = 64,354,663.81
5. Step 5: Solve for x
   x = 64,354,663.81/9,102.14
6. Step 6: Final answer
   x = 7,070.28