Finding the Fourth Proportional to 12,812.53, 17,680.78 and 7,434.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,812.53 : 17,680.78 = 7,434.69 : x
2. Step 2: Convert to fraction form
   12,812.53/17,680.78 = 7,434.69/x
3. Step 3: Cross multiply
   12,812.53x = 17,680.78 × 7,434.69
4. Step 4: Simplify right side
   12,812.53x = 131,451,140.72
5. Step 5: Solve for x
   x = 131,451,140.72/12,812.53
6. Step 6: Final answer
   x = 10,259.58