Finding the Fourth Proportional to 1,078.11, 1,487.03 and 1,061.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,078.11 : 1,487.03 = 1,061.91 : x
2. Step 2: Convert to fraction form
   1,078.11/1,487.03 = 1,061.91/x
3. Step 3: Cross multiply
   1,078.11x = 1,487.03 × 1,061.91
4. Step 4: Simplify right side
   1,078.11x = 1,579,086.72
5. Step 5: Solve for x
   x = 1,579,086.72/1,078.11
6. Step 6: Final answer
   x = 1,464.68