Finding the Fourth Proportional to 1,435.69, 1,981.10 and 806.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,435.69 : 1,981.10 = 806.18 : x
2. Step 2: Convert to fraction form
   1,435.69/1,981.10 = 806.18/x
3. Step 3: Cross multiply
   1,435.69x = 1,981.10 × 806.18
4. Step 4: Simplify right side
   1,435.69x = 1,597,130.17
5. Step 5: Solve for x
   x = 1,597,130.17/1,435.69
6. Step 6: Final answer
   x = 1,112.45