Finding the Fourth Proportional to 3,145.86, 4,718.31 and 924.09

Step by Step Solution

1. Step 1: Write the proportion equation
   3,145.86 : 4,718.31 = 924.09 : x
2. Step 2: Convert to fraction form
   3,145.86/4,718.31 = 924.09/x
3. Step 3: Cross multiply
   3,145.86x = 4,718.31 × 924.09
4. Step 4: Simplify right side
   3,145.86x = 4,360,143.09
5. Step 5: Solve for x
   x = 4,360,143.09/3,145.86
6. Step 6: Final answer
   x = 1,385.99