Finding the Fourth Proportional to 2,051.78, 3,074.68 and 1,171.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,051.78 : 3,074.68 = 1,171.56 : x
2. Step 2: Convert to fraction form
   2,051.78/3,074.68 = 1,171.56/x
3. Step 3: Cross multiply
   2,051.78x = 3,074.68 × 1,171.56
4. Step 4: Simplify right side
   2,051.78x = 3,602,169.17
5. Step 5: Solve for x
   x = 3,602,169.17/2,051.78
6. Step 6: Final answer
   x = 1,755.64