Finding the Fourth Proportional to 2,911.72, 4,368.12 and 1,181.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,911.72 : 4,368.12 = 1,181.56 : x
2. Step 2: Convert to fraction form
   2,911.72/4,368.12 = 1,181.56/x
3. Step 3: Cross multiply
   2,911.72x = 4,368.12 × 1,181.56
4. Step 4: Simplify right side
   2,911.72x = 5,161,195.87
5. Step 5: Solve for x
   x = 5,161,195.87/2,911.72
6. Step 6: Final answer
   x = 1,772.56