Finding the Fourth Proportional to 137,839.83, 206,841 and 57,891.83

Step by Step Solution

1. Step 1: Write the proportion equation
   137,839.83 : 206,841 = 57,891.83 : x
2. Step 2: Convert to fraction form
   137,839.83/206,841 = 57,891.83/x
3. Step 3: Cross multiply
   137,839.83x = 206,841 × 57,891.83
4. Step 4: Simplify right side
   137,839.83x = 11,974,402,974.83
5. Step 5: Solve for x
   x = 11,974,402,974.83/137,839.83
6. Step 6: Final answer
   x = 86,871.86