Finding the Fourth Proportional to 12,380.07, 17,097.98 and 8,407.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.07 : 17,097.98 = 8,407.83 : x
2. Step 2: Convert to fraction form
   12,380.07/17,097.98 = 8,407.83/x
3. Step 3: Cross multiply
   12,380.07x = 17,097.98 × 8,407.83
4. Step 4: Simplify right side
   12,380.07x = 143,756,867.14
5. Step 5: Solve for x
   x = 143,756,867.14/12,380.07
6. Step 6: Final answer
   x = 11,611.96