Finding the Fourth Proportional to 31,781.60, 43,860.69 and 18,353.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,781.60 : 43,860.69 = 18,353.42 : x
2. Step 2: Convert to fraction form
   31,781.60/43,860.69 = 18,353.42/x
3. Step 3: Cross multiply
   31,781.60x = 43,860.69 × 18,353.42
4. Step 4: Simplify right side
   31,781.60x = 804,993,445.76
5. Step 5: Solve for x
   x = 804,993,445.76/31,781.60
6. Step 6: Final answer
   x = 25,328.92