Finding the Fourth Proportional to 2,210.72, 3,050.82 and 1,215.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.72 : 3,050.82 = 1,215.98 : x
2. Step 2: Convert to fraction form
   2,210.72/3,050.82 = 1,215.98/x
3. Step 3: Cross multiply
   2,210.72x = 3,050.82 × 1,215.98
4. Step 4: Simplify right side
   2,210.72x = 3,709,736.10
5. Step 5: Solve for x
   x = 3,709,736.10/2,210.72
6. Step 6: Final answer
   x = 1,678.07