Finding the Fourth Proportional to 2,386.71, 3,578.58 and 925.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.71 : 3,578.58 = 925.53 : x
2. Step 2: Convert to fraction form
   2,386.71/3,578.58 = 925.53/x
3. Step 3: Cross multiply
   2,386.71x = 3,578.58 × 925.53
4. Step 4: Simplify right side
   2,386.71x = 3,312,083.15
5. Step 5: Solve for x
   x = 3,312,083.15/2,386.71
6. Step 6: Final answer
   x = 1,387.72