Finding the Fourth Proportional to 2,279.31, 3,145.28 and 1,491.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,279.31 : 3,145.28 = 1,491.99 : x
2. Step 2: Convert to fraction form
   2,279.31/3,145.28 = 1,491.99/x
3. Step 3: Cross multiply
   2,279.31x = 3,145.28 × 1,491.99
4. Step 4: Simplify right side
   2,279.31x = 4,692,718.85
5. Step 5: Solve for x
   x = 4,692,718.85/2,279.31
6. Step 6: Final answer
   x = 2,058.83