Finding the Fourth Proportional to 1,969.92, 2,719.40 and 1,403.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.92 : 2,719.40 = 1,403.15 : x
2. Step 2: Convert to fraction form
   1,969.92/2,719.40 = 1,403.15/x
3. Step 3: Cross multiply
   1,969.92x = 2,719.40 × 1,403.15
4. Step 4: Simplify right side
   1,969.92x = 3,815,705.50
5. Step 5: Solve for x
   x = 3,815,705.50/1,969.92
6. Step 6: Final answer
   x = 1,936.99