Finding the Fourth Proportional to 22,080.72, 30,475.72 and 12,655.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,080.72 : 30,475.72 = 12,655.60 : x
2. Step 2: Convert to fraction form
   22,080.72/30,475.72 = 12,655.60/x
3. Step 3: Cross multiply
   22,080.72x = 30,475.72 × 12,655.60
4. Step 4: Simplify right side
   22,080.72x = 385,688,522.03
5. Step 5: Solve for x
   x = 385,688,522.03/22,080.72
6. Step 6: Final answer
   x = 17,467.21