Finding the Fourth Proportional to 2,633.78, 3,632.42 and 1,972.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.78 : 3,632.42 = 1,972.20 : x
2. Step 2: Convert to fraction form
   2,633.78/3,632.42 = 1,972.20/x
3. Step 3: Cross multiply
   2,633.78x = 3,632.42 × 1,972.20
4. Step 4: Simplify right side
   2,633.78x = 7,163,858.72
5. Step 5: Solve for x
   x = 7,163,858.72/2,633.78
6. Step 6: Final answer
   x = 2,719.99