Finding the Fourth Proportional to 13,978.90, 19,295.38 and 8,956.62

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.90 : 19,295.38 = 8,956.62 : x
2. Step 2: Convert to fraction form
   13,978.90/19,295.38 = 8,956.62/x
3. Step 3: Cross multiply
   13,978.90x = 19,295.38 × 8,956.62
4. Step 4: Simplify right side
   13,978.90x = 172,821,386.42
5. Step 5: Solve for x
   x = 172,821,386.42/13,978.90
6. Step 6: Final answer
   x = 12,363.02