Finding the Fourth Proportional to 2,434.80, 3,359.72 and 1,386.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,434.80 : 3,359.72 = 1,386.88 : x
2. Step 2: Convert to fraction form
   2,434.80/3,359.72 = 1,386.88/x
3. Step 3: Cross multiply
   2,434.80x = 3,359.72 × 1,386.88
4. Step 4: Simplify right side
   2,434.80x = 4,659,528.47
5. Step 5: Solve for x
   x = 4,659,528.47/2,434.80
6. Step 6: Final answer
   x = 1,913.72