Finding the Fourth Proportional to 8,123.10, 11,061.24 and 8,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.10 : 11,061.24 = 8,123.10 : x
2. Step 2: Convert to fraction form
   8,123.10/11,061.24 = 8,123.10/x
3. Step 3: Cross multiply
   8,123.10x = 11,061.24 × 8,123.10
4. Step 4: Simplify right side
   8,123.10x = 89,851,558.64
5. Step 5: Solve for x
   x = 89,851,558.64/8,123.10
6. Step 6: Final answer
   x = 11,061.24