Finding the Fourth Proportional to 2,210.75, 3,050.71 and 1,215.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.75 : 3,050.71 = 1,215.87 : x
2. Step 2: Convert to fraction form
   2,210.75/3,050.71 = 1,215.87/x
3. Step 3: Cross multiply
   2,210.75x = 3,050.71 × 1,215.87
4. Step 4: Simplify right side
   2,210.75x = 3,709,259.13
5. Step 5: Solve for x
   x = 3,709,259.13/2,210.75
6. Step 6: Final answer
   x = 1,677.83