Finding the Fourth Proportional to 2,386.95, 3,580.49 and 926.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,386.95 : 3,580.49 = 926.43 : x
2. Step 2: Convert to fraction form
   2,386.95/3,580.49 = 926.43/x
3. Step 3: Cross multiply
   2,386.95x = 3,580.49 × 926.43
4. Step 4: Simplify right side
   2,386.95x = 3,317,068.72
5. Step 5: Solve for x
   x = 3,317,068.72/2,386.95
6. Step 6: Final answer
   x = 1,389.67