Finding the Fourth Proportional to 1,191.40, 1,644.72 and 749.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.40 : 1,644.72 = 749.98 : x
2. Step 2: Convert to fraction form
   1,191.40/1,644.72 = 749.98/x
3. Step 3: Cross multiply
   1,191.40x = 1,644.72 × 749.98
4. Step 4: Simplify right side
   1,191.40x = 1,233,507.11
5. Step 5: Solve for x
   x = 1,233,507.11/1,191.40
6. Step 6: Final answer
   x = 1,035.34