Finding the Fourth Proportional to 2,740.68, 4,111.52 and 891.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740.68 : 4,111.52 = 891.88 : x
2. Step 2: Convert to fraction form
   2,740.68/4,111.52 = 891.88/x
3. Step 3: Cross multiply
   2,740.68x = 4,111.52 × 891.88
4. Step 4: Simplify right side
   2,740.68x = 3,666,982.46
5. Step 5: Solve for x
   x = 3,666,982.46/2,740.68
6. Step 6: Final answer
   x = 1,337.98