Finding the Fourth Proportional to 2,739.89, 3,780.68 and 1,560.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,739.89 : 3,780.68 = 1,560.74 : x
2. Step 2: Convert to fraction form
   2,739.89/3,780.68 = 1,560.74/x
3. Step 3: Cross multiply
   2,739.89x = 3,780.68 × 1,560.74
4. Step 4: Simplify right side
   2,739.89x = 5,900,631.80
5. Step 5: Solve for x
   x = 5,900,631.80/2,739.89
6. Step 6: Final answer
   x = 2,153.60