Finding the Fourth Proportional to 2,221.05, 3,064.91 and 1,276.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.05 : 3,064.91 = 1,276.63 : x
2. Step 2: Convert to fraction form
   2,221.05/3,064.91 = 1,276.63/x
3. Step 3: Cross multiply
   2,221.05x = 3,064.91 × 1,276.63
4. Step 4: Simplify right side
   2,221.05x = 3,912,742.01
5. Step 5: Solve for x
   x = 3,912,742.01/2,221.05
6. Step 6: Final answer
   x = 1,761.66