Finding the Fourth Proportional to 2,385.98, 3,577.92 and 1,399.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.98 : 3,577.92 = 1,399.76 : x
2. Step 2: Convert to fraction form
   2,385.98/3,577.92 = 1,399.76/x
3. Step 3: Cross multiply
   2,385.98x = 3,577.92 × 1,399.76
4. Step 4: Simplify right side
   2,385.98x = 5,008,229.30
5. Step 5: Solve for x
   x = 5,008,229.30/2,385.98
6. Step 6: Final answer
   x = 2,099.02