Finding the Fourth Proportional to 31,637, 43,659.12 and 18,209.12

Step by Step Solution

1. Step 1: Write the proportion equation
   31,637 : 43,659.12 = 18,209.12 : x
2. Step 2: Convert to fraction form
   31,637/43,659.12 = 18,209.12/x
3. Step 3: Cross multiply
   31,637x = 43,659.12 × 18,209.12
4. Step 4: Simplify right side
   31,637x = 794,994,155.17
5. Step 5: Solve for x
   x = 794,994,155.17/31,637
6. Step 6: Final answer
   x = 25,128.62