Finding the Fourth Proportional to 1,772.39, 2,445.89 and 986.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.39 : 2,445.89 = 986.48 : x
2. Step 2: Convert to fraction form
   1,772.39/2,445.89 = 986.48/x
3. Step 3: Cross multiply
   1,772.39x = 2,445.89 × 986.48
4. Step 4: Simplify right side
   1,772.39x = 2,412,804.41
5. Step 5: Solve for x
   x = 2,412,804.41/1,772.39
6. Step 6: Final answer
   x = 1,361.33