Finding the Fourth Proportional to 22,978.50, 31,713.06 and 12,906.96

Step by Step Solution

1. Step 1: Write the proportion equation
   22,978.50 : 31,713.06 = 12,906.96 : x
2. Step 2: Convert to fraction form
   22,978.50/31,713.06 = 12,906.96/x
3. Step 3: Cross multiply
   22,978.50x = 31,713.06 × 12,906.96
4. Step 4: Simplify right side
   22,978.50x = 409,319,196.90
5. Step 5: Solve for x
   x = 409,319,196.90/22,978.50
6. Step 6: Final answer
   x = 17,813.14