Finding the Fourth Proportional to 2,577.32, 3,556.58 and 1,398.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.32 : 3,556.58 = 1,398.38 : x
2. Step 2: Convert to fraction form
   2,577.32/3,556.58 = 1,398.38/x
3. Step 3: Cross multiply
   2,577.32x = 3,556.58 × 1,398.38
4. Step 4: Simplify right side
   2,577.32x = 4,973,450.34
5. Step 5: Solve for x
   x = 4,973,450.34/2,577.32
6. Step 6: Final answer
   x = 1,929.70