Finding the Fourth Proportional to 1,631.30, 2,290.30 and 1,631.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,631.30 : 2,290.30 = 1,631.30 : x
2. Step 2: Convert to fraction form
   1,631.30/2,290.30 = 1,631.30/x
3. Step 3: Cross multiply
   1,631.30x = 2,290.30 × 1,631.30
4. Step 4: Simplify right side
   1,631.30x = 3,736,166.39
5. Step 5: Solve for x
   x = 3,736,166.39/1,631.30
6. Step 6: Final answer
   x = 2,290.30