Finding the Fourth Proportional to 56,989.50, 78,645.54 and 31,839

Step by Step Solution

1. Step 1: Write the proportion equation
   56,989.50 : 78,645.54 = 31,839 : x
2. Step 2: Convert to fraction form
   56,989.50/78,645.54 = 31,839/x
3. Step 3: Cross multiply
   56,989.50x = 78,645.54 × 31,839
4. Step 4: Simplify right side
   56,989.50x = 2,503,995,348.06
5. Step 5: Solve for x
   x = 2,503,995,348.06/56,989.50
6. Step 6: Final answer
   x = 43,937.84