Finding the Fourth Proportional to 31,675.60, 43,693.32 and 20,920.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,675.60 : 43,693.32 = 20,920.49 : x
2. Step 2: Convert to fraction form
   31,675.60/43,693.32 = 20,920.49/x
3. Step 3: Cross multiply
   31,675.60x = 43,693.32 × 20,920.49
4. Step 4: Simplify right side
   31,675.60x = 914,085,559.52
5. Step 5: Solve for x
   x = 914,085,559.52/31,675.60
6. Step 6: Final answer
   x = 28,857.72