Finding the Fourth Proportional to 1,435.74, 1,981.29 and 806.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.74 : 1,981.29 = 806.25 : x
2. Step 2: Convert to fraction form
   1,435.74/1,981.29 = 806.25/x
3. Step 3: Cross multiply
   1,435.74x = 1,981.29 × 806.25
4. Step 4: Simplify right side
   1,435.74x = 1,597,415.06
5. Step 5: Solve for x
   x = 1,597,415.06/1,435.74
6. Step 6: Final answer
   x = 1,112.61