Finding the Fourth Proportional to 1,411.60, 1,946.16 and 1,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.60 : 1,946.16 = 1,018.72 : x
2. Step 2: Convert to fraction form
   1,411.60/1,946.16 = 1,018.72/x
3. Step 3: Cross multiply
   1,411.60x = 1,946.16 × 1,018.72
4. Step 4: Simplify right side
   1,411.60x = 1,982,592.12
5. Step 5: Solve for x
   x = 1,982,592.12/1,411.60
6. Step 6: Final answer
   x = 1,404.50