Finding the Fourth Proportional to 3,379.31, 5,069.78 and 1,070.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,379.31 : 5,069.78 = 1,070.81 : x
2. Step 2: Convert to fraction form
   3,379.31/5,069.78 = 1,070.81/x
3. Step 3: Cross multiply
   3,379.31x = 5,069.78 × 1,070.81
4. Step 4: Simplify right side
   3,379.31x = 5,428,786.47
5. Step 5: Solve for x
   x = 5,428,786.47/3,379.31
6. Step 6: Final answer
   x = 1,606.48