Finding the Fourth Proportional to 2,388.56, 3,580.79 and 906.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.56 : 3,580.79 = 906.95 : x
2. Step 2: Convert to fraction form
   2,388.56/3,580.79 = 906.95/x
3. Step 3: Cross multiply
   2,388.56x = 3,580.79 × 906.95
4. Step 4: Simplify right side
   2,388.56x = 3,247,597.49
5. Step 5: Solve for x
   x = 3,247,597.49/2,388.56
6. Step 6: Final answer
   x = 1,359.65