Finding the Fourth Proportional to 1,783.86, 2,461.59 and 997.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,783.86 : 2,461.59 = 997.80 : x
2. Step 2: Convert to fraction form
   1,783.86/2,461.59 = 997.80/x
3. Step 3: Cross multiply
   1,783.86x = 2,461.59 × 997.80
4. Step 4: Simplify right side
   1,783.86x = 2,456,174.50
5. Step 5: Solve for x
   x = 2,456,174.50/1,783.86
6. Step 6: Final answer
   x = 1,376.89