Finding the Fourth Proportional to 1,191.72, 1,644.63 and 694.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.72 : 1,644.63 = 694.32 : x
2. Step 2: Convert to fraction form
   1,191.72/1,644.63 = 694.32/x
3. Step 3: Cross multiply
   1,191.72x = 1,644.63 × 694.32
4. Step 4: Simplify right side
   1,191.72x = 1,141,899.50
5. Step 5: Solve for x
   x = 1,141,899.50/1,191.72
6. Step 6: Final answer
   x = 958.19