Finding the Fourth Proportional to 2,210.02, 3,315.43 and 910.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.02 : 3,315.43 = 910.78 : x
2. Step 2: Convert to fraction form
   2,210.02/3,315.43 = 910.78/x
3. Step 3: Cross multiply
   2,210.02x = 3,315.43 × 910.78
4. Step 4: Simplify right side
   2,210.02x = 3,019,627.34
5. Step 5: Solve for x
   x = 3,019,627.34/2,210.02
6. Step 6: Final answer
   x = 1,366.33