Finding the Fourth Proportional to 1,107.30, 1,528.04 and 609.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.30 : 1,528.04 = 609.94 : x
2. Step 2: Convert to fraction form
   1,107.30/1,528.04 = 609.94/x
3. Step 3: Cross multiply
   1,107.30x = 1,528.04 × 609.94
4. Step 4: Simplify right side
   1,107.30x = 932,012.72
5. Step 5: Solve for x
   x = 932,012.72/1,107.30
6. Step 6: Final answer
   x = 841.70