Finding the Fourth Proportional to 3,386.31, 5,077.59 and 1,045.65

Step by Step Solution

1. Step 1: Write the proportion equation
   3,386.31 : 5,077.59 = 1,045.65 : x
2. Step 2: Convert to fraction form
   3,386.31/5,077.59 = 1,045.65/x
3. Step 3: Cross multiply
   3,386.31x = 5,077.59 × 1,045.65
4. Step 4: Simplify right side
   3,386.31x = 5,309,381.98
5. Step 5: Solve for x
   x = 5,309,381.98/3,386.31
6. Step 6: Final answer
   x = 1,567.90