Finding the Fourth Proportional to 1,378.18, 1,901.91 and 748.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.18 : 1,901.91 = 748.72 : x
2. Step 2: Convert to fraction form
   1,378.18/1,901.91 = 748.72/x
3. Step 3: Cross multiply
   1,378.18x = 1,901.91 × 748.72
4. Step 4: Simplify right side
   1,378.18x = 1,423,998.06
5. Step 5: Solve for x
   x = 1,423,998.06/1,378.18
6. Step 6: Final answer
   x = 1,033.25