Finding the Fourth Proportional to 2,000.71, 3,002.64 and 1,388.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,000.71 : 3,002.64 = 1,388.72 : x
2. Step 2: Convert to fraction form
   2,000.71/3,002.64 = 1,388.72/x
3. Step 3: Cross multiply
   2,000.71x = 3,002.64 × 1,388.72
4. Step 4: Simplify right side
   2,000.71x = 4,169,828.52
5. Step 5: Solve for x
   x = 4,169,828.52/2,000.71
6. Step 6: Final answer
   x = 2,084.17