Finding the Fourth Proportional to 22,085.34, 30,478.58 and 12,655.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,085.34 : 30,478.58 = 12,655.72 : x
2. Step 2: Convert to fraction form
   22,085.34/30,478.58 = 12,655.72/x
3. Step 3: Cross multiply
   22,085.34x = 30,478.58 × 12,655.72
4. Step 4: Simplify right side
   22,085.34x = 385,728,374.48
5. Step 5: Solve for x
   x = 385,728,374.48/22,085.34
6. Step 6: Final answer
   x = 17,465.36