Finding the Fourth Proportional to 16,870.78, 25,321.53 and 8,979.93

Step by Step Solution

1. Step 1: Write the proportion equation
   16,870.78 : 25,321.53 = 8,979.93 : x
2. Step 2: Convert to fraction form
   16,870.78/25,321.53 = 8,979.93/x
3. Step 3: Cross multiply
   16,870.78x = 25,321.53 × 8,979.93
4. Step 4: Simplify right side
   16,870.78x = 227,385,440.29
5. Step 5: Solve for x
   x = 227,385,440.29/16,870.78
6. Step 6: Final answer
   x = 13,478.06