Finding the Fourth Proportional to 8,123.10, 12,154.26 and 5,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.10 : 12,154.26 = 5,788.50 : x
2. Step 2: Convert to fraction form
   8,123.10/12,154.26 = 5,788.50/x
3. Step 3: Cross multiply
   8,123.10x = 12,154.26 × 5,788.50
4. Step 4: Simplify right side
   8,123.10x = 70,354,934.01
5. Step 5: Solve for x
   x = 70,354,934.01/8,123.10
6. Step 6: Final answer
   x = 8,661.09