Finding the Fourth Proportional to 9,101.57, 12,560.00 and 5,123.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,101.57 : 12,560.00 = 5,123.12 : x
2. Step 2: Convert to fraction form
   9,101.57/12,560.00 = 5,123.12/x
3. Step 3: Cross multiply
   9,101.57x = 12,560.00 × 5,123.12
4. Step 4: Simplify right side
   9,101.57x = 64,346,298.78
5. Step 5: Solve for x
   x = 64,346,298.78/9,101.57
6. Step 6: Final answer
   x = 7,069.81