Finding the Fourth Proportional to 1,665,128.85, 2,498,689.74 and 718,499.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665,128.85 : 2,498,689.74 = 718,499.61 : x
2. Step 2: Convert to fraction form
   1,665,128.85/2,498,689.74 = 718,499.61/x
3. Step 3: Cross multiply
   1,665,128.85x = 2,498,689.74 × 718,499.61
4. Step 4: Simplify right side
   1,665,128.85x = 1,795,307,603,701.00
5. Step 5: Solve for x
   x = 1,795,307,603,701.00/1,665,128.85
6. Step 6: Final answer
   x = 1,078,179.39