Finding the Fourth Proportional to 1,285.29, 1,774.59 and 986.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,285.29 : 1,774.59 = 986.02 : x
2. Step 2: Convert to fraction form
   1,285.29/1,774.59 = 986.02/x
3. Step 3: Cross multiply
   1,285.29x = 1,774.59 × 986.02
4. Step 4: Simplify right side
   1,285.29x = 1,749,773.10
5. Step 5: Solve for x
   x = 1,749,773.10/1,285.29
6. Step 6: Final answer
   x = 1,361.38