Finding the Fourth Proportional to 2,798.55, 3,861.91 and 1,539.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,798.55 : 3,861.91 = 1,539.60 : x
2. Step 2: Convert to fraction form
   2,798.55/3,861.91 = 1,539.60/x
3. Step 3: Cross multiply
   2,798.55x = 3,861.91 × 1,539.60
4. Step 4: Simplify right side
   2,798.55x = 5,945,796.64
5. Step 5: Solve for x
   x = 5,945,796.64/2,798.55
6. Step 6: Final answer
   x = 2,124.60