Finding the Fourth Proportional to 1,435.52, 1,981 and 806.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.52 : 1,981 = 806.10 : x
2. Step 2: Convert to fraction form
   1,435.52/1,981 = 806.10/x
3. Step 3: Cross multiply
   1,435.52x = 1,981 × 806.10
4. Step 4: Simplify right side
   1,435.52x = 1,596,884.10
5. Step 5: Solve for x
   x = 1,596,884.10/1,435.52
6. Step 6: Final answer
   x = 1,112.41