Finding the Fourth Proportional to 1,972.17, 2,721.33 and 1,919.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,972.17 : 2,721.33 = 1,919.01 : x
2. Step 2: Convert to fraction form
   1,972.17/2,721.33 = 1,919.01/x
3. Step 3: Cross multiply
   1,972.17x = 2,721.33 × 1,919.01
4. Step 4: Simplify right side
   1,972.17x = 5,222,259.48
5. Step 5: Solve for x
   x = 5,222,259.48/1,972.17
6. Step 6: Final answer
   x = 2,647.98