Finding the Fourth Proportional to 1,191.15, 1,643.52 and 748.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.15 : 1,643.52 = 748.89 : x
2. Step 2: Convert to fraction form
   1,191.15/1,643.52 = 748.89/x
3. Step 3: Cross multiply
   1,191.15x = 1,643.52 × 748.89
4. Step 4: Simplify right side
   1,191.15x = 1,230,818.50
5. Step 5: Solve for x
   x = 1,230,818.50/1,191.15
6. Step 6: Final answer
   x = 1,033.30