Finding the Fourth Proportional to 22,776.76, 31,432.20 and 12,706.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,776.76 : 31,432.20 = 12,706.08 : x
2. Step 2: Convert to fraction form
   22,776.76/31,432.20 = 12,706.08/x
3. Step 3: Cross multiply
   22,776.76x = 31,432.20 × 12,706.08
4. Step 4: Simplify right side
   22,776.76x = 399,380,047.78
5. Step 5: Solve for x
   x = 399,380,047.78/22,776.76
6. Step 6: Final answer
   x = 17,534.54