Finding the Fourth Proportional to 1,435.74, 2,151.57 and 850.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.74 : 2,151.57 = 850.86 : x
2. Step 2: Convert to fraction form
   1,435.74/2,151.57 = 850.86/x
3. Step 3: Cross multiply
   1,435.74x = 2,151.57 × 850.86
4. Step 4: Simplify right side
   1,435.74x = 1,830,684.85
5. Step 5: Solve for x
   x = 1,830,684.85/1,435.74
6. Step 6: Final answer
   x = 1,275.08