Finding the Fourth Proportional to 2,740.10, 4,109.77 and 891.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.10 : 4,109.77 = 891.25 : x
2. Step 2: Convert to fraction form
   2,740.10/4,109.77 = 891.25/x
3. Step 3: Cross multiply
   2,740.10x = 4,109.77 × 891.25
4. Step 4: Simplify right side
   2,740.10x = 3,662,820.01
5. Step 5: Solve for x
   x = 3,662,820.01/2,740.10
6. Step 6: Final answer
   x = 1,336.75