Finding the Fourth Proportional to 22,061.55, 30,445.68 and 12,985.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,061.55 : 30,445.68 = 12,985.27 : x
2. Step 2: Convert to fraction form
   22,061.55/30,445.68 = 12,985.27/x
3. Step 3: Cross multiply
   22,061.55x = 30,445.68 × 12,985.27
4. Step 4: Simplify right side
   22,061.55x = 395,345,375.13
5. Step 5: Solve for x
   x = 395,345,375.13/22,061.55
6. Step 6: Final answer
   x = 17,920.11