Finding the Fourth Proportional to 2,577.93, 3,557.53 and 1,398.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.93 : 3,557.53 = 1,398.99 : x
2. Step 2: Convert to fraction form
   2,577.93/3,557.53 = 1,398.99/x
3. Step 3: Cross multiply
   2,577.93x = 3,557.53 × 1,398.99
4. Step 4: Simplify right side
   2,577.93x = 4,976,948.89
5. Step 5: Solve for x
   x = 4,976,948.89/2,577.93
6. Step 6: Final answer
   x = 1,930.60