Finding the Fourth Proportional to 1,418.80, 1,971.49 and 1,403.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,418.80 : 1,971.49 = 1,403.62 : x
2. Step 2: Convert to fraction form
   1,418.80/1,971.49 = 1,403.62/x
3. Step 3: Cross multiply
   1,418.80x = 1,971.49 × 1,403.62
4. Step 4: Simplify right side
   1,418.80x = 2,767,222.79
5. Step 5: Solve for x
   x = 2,767,222.79/1,418.80
6. Step 6: Final answer
   x = 1,950.40