Finding the Fourth Proportional to 22,528.42, 31,088.67 and 12,456.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,528.42 : 31,088.67 = 12,456.60 : x
2. Step 2: Convert to fraction form
   22,528.42/31,088.67 = 12,456.60/x
3. Step 3: Cross multiply
   22,528.42x = 31,088.67 × 12,456.60
4. Step 4: Simplify right side
   22,528.42x = 387,259,173.34
5. Step 5: Solve for x
   x = 387,259,173.34/22,528.42
6. Step 6: Final answer
   x = 17,189.81