Finding the Fourth Proportional to 2,438.78, 3,362.72 and 1,906.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,438.78 : 3,362.72 = 1,906.62 : x
2. Step 2: Convert to fraction form
   2,438.78/3,362.72 = 1,906.62/x
3. Step 3: Cross multiply
   2,438.78x = 3,362.72 × 1,906.62
4. Step 4: Simplify right side
   2,438.78x = 6,411,429.21
5. Step 5: Solve for x
   x = 6,411,429.21/2,438.78
6. Step 6: Final answer
   x = 2,628.95