Finding the Fourth Proportional to 1,086,575.30, 1,499,479.71 and 678,913.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,575.30 : 1,499,479.71 = 678,913.55 : x
2. Step 2: Convert to fraction form
   1,086,575.30/1,499,479.71 = 678,913.55/x
3. Step 3: Cross multiply
   1,086,575.30x = 1,499,479.71 × 678,913.55
4. Step 4: Simplify right side
   1,086,575.30x = 1,018,017,085,571.67
5. Step 5: Solve for x
   x = 1,018,017,085,571.67/1,086,575.30
6. Step 6: Final answer
   x = 936,904.32