Finding the Fourth Proportional to 31,784.50, 43,862.61 and 20,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,784.50 : 43,862.61 = 20,606.50 : x
2. Step 2: Convert to fraction form
   31,784.50/43,862.61 = 20,606.50/x
3. Step 3: Cross multiply
   31,784.50x = 43,862.61 × 20,606.50
4. Step 4: Simplify right side
   31,784.50x = 903,854,872.97
5. Step 5: Solve for x
   x = 903,854,872.97/31,784.50
6. Step 6: Final answer
   x = 28,436.97