Finding the Fourth Proportional to 22,191.62, 30,621.92 and 12,763.22

Step by Step Solution

1. Step 1: Write the proportion equation
   22,191.62 : 30,621.92 = 12,763.22 : x
2. Step 2: Convert to fraction form
   22,191.62/30,621.92 = 12,763.22/x
3. Step 3: Cross multiply
   22,191.62x = 30,621.92 × 12,763.22
4. Step 4: Simplify right side
   22,191.62x = 390,834,301.78
5. Step 5: Solve for x
   x = 390,834,301.78/22,191.62
6. Step 6: Final answer
   x = 17,611.80