Finding the Fourth Proportional to 2,002.62, 2,986.01 and 1,999.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.62 : 2,986.01 = 1,999.89 : x
2. Step 2: Convert to fraction form
   2,002.62/2,986.01 = 1,999.89/x
3. Step 3: Cross multiply
   2,002.62x = 2,986.01 × 1,999.89
4. Step 4: Simplify right side
   2,002.62x = 5,971,700.29
5. Step 5: Solve for x
   x = 5,971,700.29/2,002.62
6. Step 6: Final answer
   x = 2,981.94