Finding the Fourth Proportional to 1,086,519.50, 1,629,810.07 and 287,801.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,519.50 : 1,629,810.07 = 287,801.11 : x
2. Step 2: Convert to fraction form
   1,086,519.50/1,629,810.07 = 287,801.11/x
3. Step 3: Cross multiply
   1,086,519.50x = 1,629,810.07 × 287,801.11
4. Step 4: Simplify right side
   1,086,519.50x = 469,061,142,441.15
5. Step 5: Solve for x
   x = 469,061,142,441.15/1,086,519.50
6. Step 6: Final answer
   x = 431,709.83