Finding the Fourth Proportional to 1,679.56, 2,518.56 and 899.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.56 : 2,518.56 = 899.42 : x
2. Step 2: Convert to fraction form
   1,679.56/2,518.56 = 899.42/x
3. Step 3: Cross multiply
   1,679.56x = 2,518.56 × 899.42
4. Step 4: Simplify right side
   1,679.56x = 2,265,249.53
5. Step 5: Solve for x
   x = 2,265,249.53/1,679.56
6. Step 6: Final answer
   x = 1,348.72