Finding the Fourth Proportional to 2,210.51, 3,050.48 and 1,215.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.51 : 3,050.48 = 1,215.78 : x
2. Step 2: Convert to fraction form
   2,210.51/3,050.48 = 1,215.78/x
3. Step 3: Cross multiply
   2,210.51x = 3,050.48 × 1,215.78
4. Step 4: Simplify right side
   2,210.51x = 3,708,714.12
5. Step 5: Solve for x
   x = 3,708,714.12/2,210.51
6. Step 6: Final answer
   x = 1,677.76