Finding the Fourth Proportional to 22,816.42, 31,486.30 and 12,745

Step by Step Solution

1. Step 1: Write the proportion equation
   22,816.42 : 31,486.30 = 12,745 : x
2. Step 2: Convert to fraction form
   22,816.42/31,486.30 = 12,745/x
3. Step 3: Cross multiply
   22,816.42x = 31,486.30 × 12,745
4. Step 4: Simplify right side
   22,816.42x = 401,292,893.50
5. Step 5: Solve for x
   x = 401,292,893.50/22,816.42
6. Step 6: Final answer
   x = 17,587.90