Finding the Fourth Proportional to 22,245.77, 30,702.61 and 12,685.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,245.77 : 30,702.61 = 12,685.68 : x
2. Step 2: Convert to fraction form
   22,245.77/30,702.61 = 12,685.68/x
3. Step 3: Cross multiply
   22,245.77x = 30,702.61 × 12,685.68
4. Step 4: Simplify right side
   22,245.77x = 389,483,501.48
5. Step 5: Solve for x
   x = 389,483,501.48/22,245.77
6. Step 6: Final answer
   x = 17,508.20