Finding the Fourth Proportional to 2,577.34, 3,556.76 and 1,398.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.34 : 3,556.76 = 1,398.42 : x
2. Step 2: Convert to fraction form
   2,577.34/3,556.76 = 1,398.42/x
3. Step 3: Cross multiply
   2,577.34x = 3,556.76 × 1,398.42
4. Step 4: Simplify right side
   2,577.34x = 4,973,844.32
5. Step 5: Solve for x
   x = 4,973,844.32/2,577.34
6. Step 6: Final answer
   x = 1,929.84