Finding the Fourth Proportional to 1,007.48, 1,507.32 and 617.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.48 : 1,507.32 = 617.42 : x
2. Step 2: Convert to fraction form
   1,007.48/1,507.32 = 617.42/x
3. Step 3: Cross multiply
   1,007.48x = 1,507.32 × 617.42
4. Step 4: Simplify right side
   1,007.48x = 930,649.51
5. Step 5: Solve for x
   x = 930,649.51/1,007.48
6. Step 6: Final answer
   x = 923.74