Finding the Fourth Proportional to 1,608.71, 2,219.73 and 900.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.71 : 2,219.73 = 900.34 : x
2. Step 2: Convert to fraction form
   1,608.71/2,219.73 = 900.34/x
3. Step 3: Cross multiply
   1,608.71x = 2,219.73 × 900.34
4. Step 4: Simplify right side
   1,608.71x = 1,998,511.71
5. Step 5: Solve for x
   x = 1,998,511.71/1,608.71
6. Step 6: Final answer
   x = 1,242.31