Finding the Fourth Proportional to 31,387.94, 43,321.53 and 17,778.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,387.94 : 43,321.53 = 17,778.42 : x
2. Step 2: Convert to fraction form
   31,387.94/43,321.53 = 17,778.42/x
3. Step 3: Cross multiply
   31,387.94x = 43,321.53 × 17,778.42
4. Step 4: Simplify right side
   31,387.94x = 770,188,422.05
5. Step 5: Solve for x
   x = 770,188,422.05/31,387.94
6. Step 6: Final answer
   x = 24,537.72