Finding the Fourth Proportional to 31,380, 43,308.24 and 18,132

Step by Step Solution

1. Step 1: Write the proportion equation
   31,380 : 43,308.24 = 18,132 : x
2. Step 2: Convert to fraction form
   31,380/43,308.24 = 18,132/x
3. Step 3: Cross multiply
   31,380x = 43,308.24 × 18,132
4. Step 4: Simplify right side
   31,380x = 785,265,007.68
5. Step 5: Solve for x
   x = 785,265,007.68/31,380
6. Step 6: Final answer
   x = 25,024.38