Finding the Fourth Proportional to 1,171.72, 1,758.22 and 651.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.72 : 1,758.22 = 651.72 : x
2. Step 2: Convert to fraction form
   1,171.72/1,758.22 = 651.72/x
3. Step 3: Cross multiply
   1,171.72x = 1,758.22 × 651.72
4. Step 4: Simplify right side
   1,171.72x = 1,145,867.14
5. Step 5: Solve for x
   x = 1,145,867.14/1,171.72
6. Step 6: Final answer
   x = 977.94