Finding the Fourth Proportional to 2,643.34, 3,964.02 and 999.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,643.34 : 3,964.02 = 999.01 : x
2. Step 2: Convert to fraction form
   2,643.34/3,964.02 = 999.01/x
3. Step 3: Cross multiply
   2,643.34x = 3,964.02 × 999.01
4. Step 4: Simplify right side
   2,643.34x = 3,960,095.62
5. Step 5: Solve for x
   x = 3,960,095.62/2,643.34
6. Step 6: Final answer
   x = 1,498.14