Finding the Fourth Proportional to 1,045.69, 1,568.34 and 387.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,045.69 : 1,568.34 = 387.47 : x
2. Step 2: Convert to fraction form
   1,045.69/1,568.34 = 387.47/x
3. Step 3: Cross multiply
   1,045.69x = 1,568.34 × 387.47
4. Step 4: Simplify right side
   1,045.69x = 607,688.62
5. Step 5: Solve for x
   x = 607,688.62/1,045.69
6. Step 6: Final answer
   x = 581.14