Finding the Fourth Proportional to 7,124.30, 10,662.15 and 7,124.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,124.30 : 10,662.15 = 7,124.30 : x
2. Step 2: Convert to fraction form
   7,124.30/10,662.15 = 7,124.30/x
3. Step 3: Cross multiply
   7,124.30x = 10,662.15 × 7,124.30
4. Step 4: Simplify right side
   7,124.30x = 75,960,355.25
5. Step 5: Solve for x
   x = 75,960,355.25/7,124.30
6. Step 6: Final answer
   x = 10,662.15