Finding the Fourth Proportional to 1,772.45, 2,445.88 and 986.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.45 : 2,445.88 = 986.34 : x
2. Step 2: Convert to fraction form
   1,772.45/2,445.88 = 986.34/x
3. Step 3: Cross multiply
   1,772.45x = 2,445.88 × 986.34
4. Step 4: Simplify right side
   1,772.45x = 2,412,469.28
5. Step 5: Solve for x
   x = 2,412,469.28/1,772.45
6. Step 6: Final answer
   x = 1,361.09