Finding the Fourth Proportional to 23,390.72, 32,279.87 and 12,781.04

Step by Step Solution

1. Step 1: Write the proportion equation
   23,390.72 : 32,279.87 = 12,781.04 : x
2. Step 2: Convert to fraction form
   23,390.72/32,279.87 = 12,781.04/x
3. Step 3: Cross multiply
   23,390.72x = 32,279.87 × 12,781.04
4. Step 4: Simplify right side
   23,390.72x = 412,570,180.22
5. Step 5: Solve for x
   x = 412,570,180.22/23,390.72
6. Step 6: Final answer
   x = 17,638.20