Finding the Fourth Proportional to 2,275.67, 3,139.31 and 1,530.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.67 : 3,139.31 = 1,530.72 : x
2. Step 2: Convert to fraction form
   2,275.67/3,139.31 = 1,530.72/x
3. Step 3: Cross multiply
   2,275.67x = 3,139.31 × 1,530.72
4. Step 4: Simplify right side
   2,275.67x = 4,805,408.43
5. Step 5: Solve for x
   x = 4,805,408.43/2,275.67
6. Step 6: Final answer
   x = 2,111.64