Finding the Fourth Proportional to 1,036.72, 1,431.12 and 704.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.72 : 1,431.12 = 704.98 : x
2. Step 2: Convert to fraction form
   1,036.72/1,431.12 = 704.98/x
3. Step 3: Cross multiply
   1,036.72x = 1,431.12 × 704.98
4. Step 4: Simplify right side
   1,036.72x = 1,008,910.98
5. Step 5: Solve for x
   x = 1,008,910.98/1,036.72
6. Step 6: Final answer
   x = 973.18