Finding the Fourth Proportional to 1,619.89, 2,429.83 and 646.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,619.89 : 2,429.83 = 646.00 : x
2. Step 2: Convert to fraction form
   1,619.89/2,429.83 = 646.00/x
3. Step 3: Cross multiply
   1,619.89x = 2,429.83 × 646.00
4. Step 4: Simplify right side
   1,619.89x = 1,569,658.03
5. Step 5: Solve for x
   x = 1,569,658.03/1,619.89
6. Step 6: Final answer
   x = 968.99