Finding the Fourth Proportional to 1,783.16, 2,460.70 and 986.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.16 : 2,460.70 = 986.55 : x
2. Step 2: Convert to fraction form
   1,783.16/2,460.70 = 986.55/x
3. Step 3: Cross multiply
   1,783.16x = 2,460.70 × 986.55
4. Step 4: Simplify right side
   1,783.16x = 2,427,603.59
5. Step 5: Solve for x
   x = 2,427,603.59/1,783.16
6. Step 6: Final answer
   x = 1,361.41