Finding the Fourth Proportional to 2,115.42, 3,173.54 and 1,061.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115.42 : 3,173.54 = 1,061.79 : x
2. Step 2: Convert to fraction form
   2,115.42/3,173.54 = 1,061.79/x
3. Step 3: Cross multiply
   2,115.42x = 3,173.54 × 1,061.79
4. Step 4: Simplify right side
   2,115.42x = 3,369,627.73
5. Step 5: Solve for x
   x = 3,369,627.73/2,115.42
6. Step 6: Final answer
   x = 1,592.89