Finding the Fourth Proportional to 2,431.24, 3,646.52 and 1,387.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.24 : 3,646.52 = 1,387.86 : x
2. Step 2: Convert to fraction form
   2,431.24/3,646.52 = 1,387.86/x
3. Step 3: Cross multiply
   2,431.24x = 3,646.52 × 1,387.86
4. Step 4: Simplify right side
   2,431.24x = 5,060,834.08
5. Step 5: Solve for x
   x = 5,060,834.08/2,431.24
6. Step 6: Final answer
   x = 2,081.59