Finding the Fourth Proportional to 2,087,775, 3,131,662.50 and 511,839

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087,775 : 3,131,662.50 = 511,839 : x
2. Step 2: Convert to fraction form
   2,087,775/3,131,662.50 = 511,839/x
3. Step 3: Cross multiply
   2,087,775x = 3,131,662.50 × 511,839
4. Step 4: Simplify right side
   2,087,775x = 1,602,907,002,337.50
5. Step 5: Solve for x
   x = 1,602,907,002,337.50/2,087,775
6. Step 6: Final answer
   x = 767,758.50