Finding the Fourth Proportional to 31,380.25, 43,308.59 and 18,132.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,380.25 : 43,308.59 = 18,132.25 : x
2. Step 2: Convert to fraction form
   31,380.25/43,308.59 = 18,132.25/x
3. Step 3: Cross multiply
   31,380.25x = 43,308.59 × 18,132.25
4. Step 4: Simplify right side
   31,380.25x = 785,282,090.37
5. Step 5: Solve for x
   x = 785,282,090.37/31,380.25
6. Step 6: Final answer
   x = 25,024.72