Finding the Fourth Proportional to 1,017.36, 1,528.09 and 607.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.36 : 1,528.09 = 607.30 : x
2. Step 2: Convert to fraction form
   1,017.36/1,528.09 = 607.30/x
3. Step 3: Cross multiply
   1,017.36x = 1,528.09 × 607.30
4. Step 4: Simplify right side
   1,017.36x = 928,003.72
5. Step 5: Solve for x
   x = 928,003.72/1,017.36
6. Step 6: Final answer
   x = 912.17