Finding the Fourth Proportional to 12,611.62, 17,404.50 and 7,834.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,611.62 : 17,404.50 = 7,834.20 : x
2. Step 2: Convert to fraction form
   12,611.62/17,404.50 = 7,834.20/x
3. Step 3: Cross multiply
   12,611.62x = 17,404.50 × 7,834.20
4. Step 4: Simplify right side
   12,611.62x = 136,350,253.94
5. Step 5: Solve for x
   x = 136,350,253.94/12,611.62
6. Step 6: Final answer
   x = 10,811.48