Finding the Fourth Proportional to 1,436.61, 1,982.50 and 807.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,436.61 : 1,982.50 = 807.17 : x
2. Step 2: Convert to fraction form
   1,436.61/1,982.50 = 807.17/x
3. Step 3: Cross multiply
   1,436.61x = 1,982.50 × 807.17
4. Step 4: Simplify right side
   1,436.61x = 1,600,214.53
5. Step 5: Solve for x
   x = 1,600,214.53/1,436.61
6. Step 6: Final answer
   x = 1,113.88