Finding the Fourth Proportional to 1,191.30, 1,644.03 and 667.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.30 : 1,644.03 = 667.32 : x
2. Step 2: Convert to fraction form
   1,191.30/1,644.03 = 667.32/x
3. Step 3: Cross multiply
   1,191.30x = 1,644.03 × 667.32
4. Step 4: Simplify right side
   1,191.30x = 1,097,094.10
5. Step 5: Solve for x
   x = 1,097,094.10/1,191.30
6. Step 6: Final answer
   x = 920.92