Finding the Fourth Proportional to 1,377.80, 1,901.34 and 748.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.80 : 1,901.34 = 748.31 : x
2. Step 2: Convert to fraction form
   1,377.80/1,901.34 = 748.31/x
3. Step 3: Cross multiply
   1,377.80x = 1,901.34 × 748.31
4. Step 4: Simplify right side
   1,377.80x = 1,422,796.49
5. Step 5: Solve for x
   x = 1,422,796.49/1,377.80
6. Step 6: Final answer
   x = 1,032.66