Finding the Fourth Proportional to 3,141.72, 4,712.85 and 1,061.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,141.72 : 4,712.85 = 1,061.78 : x
2. Step 2: Convert to fraction form
   3,141.72/4,712.85 = 1,061.78/x
3. Step 3: Cross multiply
   3,141.72x = 4,712.85 × 1,061.78
4. Step 4: Simplify right side
   3,141.72x = 5,003,986.31
5. Step 5: Solve for x
   x = 5,003,986.31/3,141.72
6. Step 6: Final answer
   x = 1,592.75