Finding the Fourth Proportional to 1,620.85, 2,429.89 and 743.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,620.85 : 2,429.89 = 743.06 : x
2. Step 2: Convert to fraction form
   1,620.85/2,429.89 = 743.06/x
3. Step 3: Cross multiply
   1,620.85x = 2,429.89 × 743.06
4. Step 4: Simplify right side
   1,620.85x = 1,805,538.20
5. Step 5: Solve for x
   x = 1,805,538.20/1,620.85
6. Step 6: Final answer
   x = 1,113.95