Finding the Fourth Proportional to 12,478.61, 17,196.71 and 8,935.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,478.61 : 17,196.71 = 8,935.67 : x
2. Step 2: Convert to fraction form
   12,478.61/17,196.71 = 8,935.67/x
3. Step 3: Cross multiply
   12,478.61x = 17,196.71 × 8,935.67
4. Step 4: Simplify right side
   12,478.61x = 153,663,994.98
5. Step 5: Solve for x
   x = 153,663,994.98/12,478.61
6. Step 6: Final answer
   x = 12,314.20