Finding the Fourth Proportional to 1,608.56, 2,219.82 and 910.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.56 : 2,219.82 = 910.07 : x
2. Step 2: Convert to fraction form
   1,608.56/2,219.82 = 910.07/x
3. Step 3: Cross multiply
   1,608.56x = 2,219.82 × 910.07
4. Step 4: Simplify right side
   1,608.56x = 2,020,191.59
5. Step 5: Solve for x
   x = 2,020,191.59/1,608.56
6. Step 6: Final answer
   x = 1,255.90