Finding the Fourth Proportional to 1,070.88, 1,606.52 and 609.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.88 : 1,606.52 = 609.31 : x
2. Step 2: Convert to fraction form
   1,070.88/1,606.52 = 609.31/x
3. Step 3: Cross multiply
   1,070.88x = 1,606.52 × 609.31
4. Step 4: Simplify right side
   1,070.88x = 978,868.70
5. Step 5: Solve for x
   x = 978,868.70/1,070.88
6. Step 6: Final answer
   x = 914.08