Finding the Fourth Proportional to 2,434.56, 3,360.24 and 1,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,434.56 : 3,360.24 = 1,386.72 : x
2. Step 2: Convert to fraction form
   2,434.56/3,360.24 = 1,386.72/x
3. Step 3: Cross multiply
   2,434.56x = 3,360.24 × 1,386.72
4. Step 4: Simplify right side
   2,434.56x = 4,659,712.01
5. Step 5: Solve for x
   x = 4,659,712.01/2,434.56
6. Step 6: Final answer
   x = 1,913.99