Finding the Fourth Proportional to 1,772.15, 2,445.33 and 986.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.15 : 2,445.33 = 986.05 : x
2. Step 2: Convert to fraction form
   1,772.15/2,445.33 = 986.05/x
3. Step 3: Cross multiply
   1,772.15x = 2,445.33 × 986.05
4. Step 4: Simplify right side
   1,772.15x = 2,411,217.65
5. Step 5: Solve for x
   x = 2,411,217.65/1,772.15
6. Step 6: Final answer
   x = 1,360.62