Finding the Fourth Proportional to 1,191.34, 1,644.80 and 749.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.34 : 1,644.80 = 749.89 : x
2. Step 2: Convert to fraction form
   1,191.34/1,644.80 = 749.89/x
3. Step 3: Cross multiply
   1,191.34x = 1,644.80 × 749.89
4. Step 4: Simplify right side
   1,191.34x = 1,233,415.32
5. Step 5: Solve for x
   x = 1,233,415.32/1,191.34
6. Step 6: Final answer
   x = 1,035.32