Finding the Fourth Proportional to 2,216.80, 3,319.35 and 1,775.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.80 : 3,319.35 = 1,775.98 : x
2. Step 2: Convert to fraction form
   2,216.80/3,319.35 = 1,775.98/x
3. Step 3: Cross multiply
   2,216.80x = 3,319.35 × 1,775.98
4. Step 4: Simplify right side
   2,216.80x = 5,895,099.21
5. Step 5: Solve for x
   x = 5,895,099.21/2,216.80
6. Step 6: Final answer
   x = 2,659.28