Finding the Fourth Proportional to 1,078.34, 1,488.05 and 606.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.34 : 1,488.05 = 606.25 : x
2. Step 2: Convert to fraction form
   1,078.34/1,488.05 = 606.25/x
3. Step 3: Cross multiply
   1,078.34x = 1,488.05 × 606.25
4. Step 4: Simplify right side
   1,078.34x = 902,123.56
5. Step 5: Solve for x
   x = 902,123.56/1,078.34
6. Step 6: Final answer
   x = 836.59