Finding the Fourth Proportional to 1,977.51, 2,727.82 and 1,278.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.51 : 2,727.82 = 1,278.89 : x
2. Step 2: Convert to fraction form
   1,977.51/2,727.82 = 1,278.89/x
3. Step 3: Cross multiply
   1,977.51x = 2,727.82 × 1,278.89
4. Step 4: Simplify right side
   1,977.51x = 3,488,579.91
5. Step 5: Solve for x
   x = 3,488,579.91/1,977.51
6. Step 6: Final answer
   x = 1,764.12