Finding the Fourth Proportional to 3,390.42, 5,086.10 and 1,050.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.42 : 5,086.10 = 1,050.61 : x
2. Step 2: Convert to fraction form
   3,390.42/5,086.10 = 1,050.61/x
3. Step 3: Cross multiply
   3,390.42x = 5,086.10 × 1,050.61
4. Step 4: Simplify right side
   3,390.42x = 5,343,507.52
5. Step 5: Solve for x
   x = 5,343,507.52/3,390.42
6. Step 6: Final answer
   x = 1,576.06