Finding the Fourth Proportional to 1,001.55, 1,501.16 and 672.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,001.55 : 1,501.16 = 672.15 : x
2. Step 2: Convert to fraction form
   1,001.55/1,501.16 = 672.15/x
3. Step 3: Cross multiply
   1,001.55x = 1,501.16 × 672.15
4. Step 4: Simplify right side
   1,001.55x = 1,009,001.33
5. Step 5: Solve for x
   x = 1,009,001.33/1,001.55
6. Step 6: Final answer
   x = 1,007.44