Finding the Fourth Proportional to 1,377.63, 1,901.12 and 748.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.63 : 1,901.12 = 748.15 : x
2. Step 2: Convert to fraction form
   1,377.63/1,901.12 = 748.15/x
3. Step 3: Cross multiply
   1,377.63x = 1,901.12 × 748.15
4. Step 4: Simplify right side
   1,377.63x = 1,422,322.93
5. Step 5: Solve for x
   x = 1,422,322.93/1,377.63
6. Step 6: Final answer
   x = 1,032.45