Finding the Fourth Proportional to 9,101.79, 12,560.81 and 5,124.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,101.79 : 12,560.81 = 5,124.15 : x
2. Step 2: Convert to fraction form
   9,101.79/12,560.81 = 5,124.15/x
3. Step 3: Cross multiply
   9,101.79x = 12,560.81 × 5,124.15
4. Step 4: Simplify right side
   9,101.79x = 64,363,448.94
5. Step 5: Solve for x
   x = 64,363,448.94/9,101.79
6. Step 6: Final answer
   x = 7,071.52