Finding the Fourth Proportional to 1,411.47, 2,108.54 and 1,018.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.47 : 2,108.54 = 1,018.11 : x
2. Step 2: Convert to fraction form
   1,411.47/2,108.54 = 1,018.11/x
3. Step 3: Cross multiply
   1,411.47x = 2,108.54 × 1,018.11
4. Step 4: Simplify right side
   1,411.47x = 2,146,725.66
5. Step 5: Solve for x
   x = 2,146,725.66/1,411.47
6. Step 6: Final answer
   x = 1,520.91