Finding the Fourth Proportional to 262,939, 362,855.82 and 143,707

Step by Step Solution

1. Step 1: Write the proportion equation
   262,939 : 362,855.82 = 143,707 : x
2. Step 2: Convert to fraction form
   262,939/362,855.82 = 143,707/x
3. Step 3: Cross multiply
   262,939x = 362,855.82 × 143,707
4. Step 4: Simplify right side
   262,939x = 52,144,921,324.74
5. Step 5: Solve for x
   x = 52,144,921,324.74/262,939
6. Step 6: Final answer
   x = 198,315.66