Finding the Fourth Proportional to 1,776.03, 2,449.60 and 1,215.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776.03 : 2,449.60 = 1,215.91 : x
2. Step 2: Convert to fraction form
   1,776.03/2,449.60 = 1,215.91/x
3. Step 3: Cross multiply
   1,776.03x = 2,449.60 × 1,215.91
4. Step 4: Simplify right side
   1,776.03x = 2,978,493.14
5. Step 5: Solve for x
   x = 2,978,493.14/1,776.03
6. Step 6: Final answer
   x = 1,677.05