Finding the Fourth Proportional to 2,290.48, 3,435.72 and 647.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,290.48 : 3,435.72 = 647.02 : x
2. Step 2: Convert to fraction form
   2,290.48/3,435.72 = 647.02/x
3. Step 3: Cross multiply
   2,290.48x = 3,435.72 × 647.02
4. Step 4: Simplify right side
   2,290.48x = 2,222,979.55
5. Step 5: Solve for x
   x = 2,222,979.55/2,290.48
6. Step 6: Final answer
   x = 970.53