Finding the Fourth Proportional to 1,620.24, 2,429.28 and 797.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.24 : 2,429.28 = 797.82 : x
2. Step 2: Convert to fraction form
   1,620.24/2,429.28 = 797.82/x
3. Step 3: Cross multiply
   1,620.24x = 2,429.28 × 797.82
4. Step 4: Simplify right side
   1,620.24x = 1,938,128.17
5. Step 5: Solve for x
   x = 1,938,128.17/1,620.24
6. Step 6: Final answer
   x = 1,196.20