Finding the Fourth Proportional to 16,978.08, 23,381.31 and 12,254.88

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.08 : 23,381.31 = 12,254.88 : x
2. Step 2: Convert to fraction form
   16,978.08/23,381.31 = 12,254.88/x
3. Step 3: Cross multiply
   16,978.08x = 23,381.31 × 12,254.88
4. Step 4: Simplify right side
   16,978.08x = 286,535,148.29
5. Step 5: Solve for x
   x = 286,535,148.29/16,978.08
6. Step 6: Final answer
   x = 16,876.77