Finding the Fourth Proportional to 2,598.39, 3,898.20 and 1,777.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,598.39 : 3,898.20 = 1,777.05 : x
2. Step 2: Convert to fraction form
   2,598.39/3,898.20 = 1,777.05/x
3. Step 3: Cross multiply
   2,598.39x = 3,898.20 × 1,777.05
4. Step 4: Simplify right side
   2,598.39x = 6,927,301.61
5. Step 5: Solve for x
   x = 6,927,301.61/2,598.39
6. Step 6: Final answer
   x = 2,666.00