Finding the Fourth Proportional to 1,620.23, 2,429.28 and 695.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.23 : 2,429.28 = 695.52 : x
2. Step 2: Convert to fraction form
   1,620.23/2,429.28 = 695.52/x
3. Step 3: Cross multiply
   1,620.23x = 2,429.28 × 695.52
4. Step 4: Simplify right side
   1,620.23x = 1,689,612.83
5. Step 5: Solve for x
   x = 1,689,612.83/1,620.23
6. Step 6: Final answer
   x = 1,042.83