Finding the Fourth Proportional to 2,428.76, 3,646.48 and 1,259.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.76 : 3,646.48 = 1,259.72 : x
2. Step 2: Convert to fraction form
   2,428.76/3,646.48 = 1,259.72/x
3. Step 3: Cross multiply
   2,428.76x = 3,646.48 × 1,259.72
4. Step 4: Simplify right side
   2,428.76x = 4,593,543.79
5. Step 5: Solve for x
   x = 4,593,543.79/2,428.76
6. Step 6: Final answer
   x = 1,891.31