Finding the Fourth Proportional to 1,772.22, 2,445.57 and 986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.22 : 2,445.57 = 986.31 : x
2. Step 2: Convert to fraction form
   1,772.22/2,445.57 = 986.31/x
3. Step 3: Cross multiply
   1,772.22x = 2,445.57 × 986.31
4. Step 4: Simplify right side
   1,772.22x = 2,412,090.15
5. Step 5: Solve for x
   x = 2,412,090.15/1,772.22
6. Step 6: Final answer
   x = 1,361.06