Finding the Fourth Proportional to 2,210.78, 3,051.30 and 1,267.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,210.78 : 3,051.30 = 1,267.20 : x
2. Step 2: Convert to fraction form
   2,210.78/3,051.30 = 1,267.20/x
3. Step 3: Cross multiply
   2,210.78x = 3,051.30 × 1,267.20
4. Step 4: Simplify right side
   2,210.78x = 3,866,609.76
5. Step 5: Solve for x
   x = 3,866,609.76/2,210.78
6. Step 6: Final answer
   x = 1,748.98