Finding the Fourth Proportional to 2,386.16, 3,578.93 and 924.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.16 : 3,578.93 = 924.31 : x
2. Step 2: Convert to fraction form
   2,386.16/3,578.93 = 924.31/x
3. Step 3: Cross multiply
   2,386.16x = 3,578.93 × 924.31
4. Step 4: Simplify right side
   2,386.16x = 3,308,040.79
5. Step 5: Solve for x
   x = 3,308,040.79/2,386.16
6. Step 6: Final answer
   x = 1,386.34