Finding the Fourth Proportional to 1,914.78, 2,871.28 and 745.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.78 : 2,871.28 = 745.35 : x
2. Step 2: Convert to fraction form
   1,914.78/2,871.28 = 745.35/x
3. Step 3: Cross multiply
   1,914.78x = 2,871.28 × 745.35
4. Step 4: Simplify right side
   1,914.78x = 2,140,108.55
5. Step 5: Solve for x
   x = 2,140,108.55/1,914.78
6. Step 6: Final answer
   x = 1,117.68