Finding the Fourth Proportional to 3,463.76, 5,196.56 and 998.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,463.76 : 5,196.56 = 998.78 : x
2. Step 2: Convert to fraction form
   3,463.76/5,196.56 = 998.78/x
3. Step 3: Cross multiply
   3,463.76x = 5,196.56 × 998.78
4. Step 4: Simplify right side
   3,463.76x = 5,190,218.45
5. Step 5: Solve for x
   x = 5,190,218.45/3,463.76
6. Step 6: Final answer
   x = 1,498.43