Finding the Fourth Proportional to 2,577.82, 3,557.29 and 1,398.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.82 : 3,557.29 = 1,398.87 : x
2. Step 2: Convert to fraction form
   2,577.82/3,557.29 = 1,398.87/x
3. Step 3: Cross multiply
   2,577.82x = 3,557.29 × 1,398.87
4. Step 4: Simplify right side
   2,577.82x = 4,976,164.98
5. Step 5: Solve for x
   x = 4,976,164.98/2,577.82
6. Step 6: Final answer
   x = 1,930.38