Finding the Fourth Proportional to 1,783.78, 2,461.71 and 997.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.78 : 2,461.71 = 997.81 : x
2. Step 2: Convert to fraction form
   1,783.78/2,461.71 = 997.81/x
3. Step 3: Cross multiply
   1,783.78x = 2,461.71 × 997.81
4. Step 4: Simplify right side
   1,783.78x = 2,456,318.86
5. Step 5: Solve for x
   x = 2,456,318.86/1,783.78
6. Step 6: Final answer
   x = 1,377.03