Finding the Fourth Proportional to 1,784.78, 2,462.78 and 998.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,784.78 : 2,462.78 = 998.63 : x
2. Step 2: Convert to fraction form
   1,784.78/2,462.78 = 998.63/x
3. Step 3: Cross multiply
   1,784.78x = 2,462.78 × 998.63
4. Step 4: Simplify right side
   1,784.78x = 2,459,401.00
5. Step 5: Solve for x
   x = 2,459,401.00/1,784.78
6. Step 6: Final answer
   x = 1,377.99