Finding the Fourth Proportional to 1,095.53, 1,641.33 and 748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.53 : 1,641.33 = 748.31 : x
2. Step 2: Convert to fraction form
   1,095.53/1,641.33 = 748.31/x
3. Step 3: Cross multiply
   1,095.53x = 1,641.33 × 748.31
4. Step 4: Simplify right side
   1,095.53x = 1,228,215.45
5. Step 5: Solve for x
   x = 1,228,215.45/1,095.53
6. Step 6: Final answer
   x = 1,121.12