Finding the Fourth Proportional to 1,628.30, 2,275.30 and 1,628.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.30 : 2,275.30 = 1,628.30 : x
2. Step 2: Convert to fraction form
   1,628.30/2,275.30 = 1,628.30/x
3. Step 3: Cross multiply
   1,628.30x = 2,275.30 × 1,628.30
4. Step 4: Simplify right side
   1,628.30x = 3,704,870.99
5. Step 5: Solve for x
   x = 3,704,870.99/1,628.30
6. Step 6: Final answer
   x = 2,275.30