Finding the Fourth Proportional to 12,300.39, 16,981.56 and 8,115.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,300.39 : 16,981.56 = 8,115.93 : x
2. Step 2: Convert to fraction form
   12,300.39/16,981.56 = 8,115.93/x
3. Step 3: Cross multiply
   12,300.39x = 16,981.56 × 8,115.93
4. Step 4: Simplify right side
   12,300.39x = 137,821,152.25
5. Step 5: Solve for x
   x = 137,821,152.25/12,300.39
6. Step 6: Final answer
   x = 11,204.62