Finding the Fourth Proportional to 2,275.55, 3,139.53 and 1,607.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.55 : 3,139.53 = 1,607.30 : x
2. Step 2: Convert to fraction form
   2,275.55/3,139.53 = 1,607.30/x
3. Step 3: Cross multiply
   2,275.55x = 3,139.53 × 1,607.30
4. Step 4: Simplify right side
   2,275.55x = 5,046,166.57
5. Step 5: Solve for x
   x = 5,046,166.57/2,275.55
6. Step 6: Final answer
   x = 2,217.56