Finding the Fourth Proportional to 2,276.72, 3,139.80 and 1,491.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,276.72 : 3,139.80 = 1,491.02 : x
2. Step 2: Convert to fraction form
   2,276.72/3,139.80 = 1,491.02/x
3. Step 3: Cross multiply
   2,276.72x = 3,139.80 × 1,491.02
4. Step 4: Simplify right side
   2,276.72x = 4,681,504.60
5. Step 5: Solve for x
   x = 4,681,504.60/2,276.72
6. Step 6: Final answer
   x = 2,056.25