Finding the Fourth Proportional to 2,001.66, 2,978.71 and 1,923.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,001.66 : 2,978.71 = 1,923.90 : x
2. Step 2: Convert to fraction form
   2,001.66/2,978.71 = 1,923.90/x
3. Step 3: Cross multiply
   2,001.66x = 2,978.71 × 1,923.90
4. Step 4: Simplify right side
   2,001.66x = 5,730,740.17
5. Step 5: Solve for x
   x = 5,730,740.17/2,001.66
6. Step 6: Final answer
   x = 2,862.99