Finding the Fourth Proportional to 2,216.82, 3,060.52 and 1,970.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.82 : 3,060.52 = 1,970.80 : x
2. Step 2: Convert to fraction form
   2,216.82/3,060.52 = 1,970.80/x
3. Step 3: Cross multiply
   2,216.82x = 3,060.52 × 1,970.80
4. Step 4: Simplify right side
   2,216.82x = 6,031,672.82
5. Step 5: Solve for x
   x = 6,031,672.82/2,216.82
6. Step 6: Final answer
   x = 2,720.87