Finding the Fourth Proportional to 1,061.40, 1,472.96 and 1,018.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.40 : 1,472.96 = 1,018.20 : x
2. Step 2: Convert to fraction form
   1,061.40/1,472.96 = 1,018.20/x
3. Step 3: Cross multiply
   1,061.40x = 1,472.96 × 1,018.20
4. Step 4: Simplify right side
   1,061.40x = 1,499,767.87
5. Step 5: Solve for x
   x = 1,499,767.87/1,061.40
6. Step 6: Final answer
   x = 1,413.01