Finding the Fourth Proportional to 9,134.68, 12,605.82 and 5,155.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,134.68 : 12,605.82 = 5,155.78 : x
2. Step 2: Convert to fraction form
   9,134.68/12,605.82 = 5,155.78/x
3. Step 3: Cross multiply
   9,134.68x = 12,605.82 × 5,155.78
4. Step 4: Simplify right side
   9,134.68x = 64,992,834.64
5. Step 5: Solve for x
   x = 64,992,834.64/9,134.68
6. Step 6: Final answer
   x = 7,114.95