Finding the Fourth Proportional to 2,216.31, 3,059.82 and 1,970.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,216.31 : 3,059.82 = 1,970.30 : x
2. Step 2: Convert to fraction form
   2,216.31/3,059.82 = 1,970.30/x
3. Step 3: Cross multiply
   2,216.31x = 3,059.82 × 1,970.30
4. Step 4: Simplify right side
   2,216.31x = 6,028,748.05
5. Step 5: Solve for x
   x = 6,028,748.05/2,216.31
6. Step 6: Final answer
   x = 2,720.17