Finding the Fourth Proportional to 1,280,105.42, 1,920,151.15 and 521,943.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280,105.42 : 1,920,151.15 = 521,943.94 : x
2. Step 2: Convert to fraction form
   1,280,105.42/1,920,151.15 = 521,943.94/x
3. Step 3: Cross multiply
   1,280,105.42x = 1,920,151.15 × 521,943.94
4. Step 4: Simplify right side
   1,280,105.42x = 1,002,211,256,626.53
5. Step 5: Solve for x
   x = 1,002,211,256,626.53/1,280,105.42
6. Step 6: Final answer
   x = 782,913.06