Finding the Fourth Proportional to 2,127.78, 3,190.91 and 740.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,127.78 : 3,190.91 = 740.78 : x
2. Step 2: Convert to fraction form
   2,127.78/3,190.91 = 740.78/x
3. Step 3: Cross multiply
   2,127.78x = 3,190.91 × 740.78
4. Step 4: Simplify right side
   2,127.78x = 2,363,762.31
5. Step 5: Solve for x
   x = 2,363,762.31/2,127.78
6. Step 6: Final answer
   x = 1,110.91