Finding the Fourth Proportional to 31,410.18, 43,339.05 and 18,662.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,410.18 : 43,339.05 = 18,662.40 : x
2. Step 2: Convert to fraction form
   31,410.18/43,339.05 = 18,662.40/x
3. Step 3: Cross multiply
   31,410.18x = 43,339.05 × 18,662.40
4. Step 4: Simplify right side
   31,410.18x = 808,810,686.72
5. Step 5: Solve for x
   x = 808,810,686.72/31,410.18
6. Step 6: Final answer
   x = 25,749.95