Finding the Fourth Proportional to 2,642.98, 3,964.56 and 999.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.98 : 3,964.56 = 999.13 : x
2. Step 2: Convert to fraction form
   2,642.98/3,964.56 = 999.13/x
3. Step 3: Cross multiply
   2,642.98x = 3,964.56 × 999.13
4. Step 4: Simplify right side
   2,642.98x = 3,961,110.83
5. Step 5: Solve for x
   x = 3,961,110.83/2,642.98
6. Step 6: Final answer
   x = 1,498.73