Finding the Fourth Proportional to 1,043.91, 1,436.40 and 1,019.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.91 : 1,436.40 = 1,019.30 : x
2. Step 2: Convert to fraction form
   1,043.91/1,436.40 = 1,019.30/x
3. Step 3: Cross multiply
   1,043.91x = 1,436.40 × 1,019.30
4. Step 4: Simplify right side
   1,043.91x = 1,464,115.34
5. Step 5: Solve for x
   x = 1,464,115.34/1,043.91
6. Step 6: Final answer
   x = 1,402.53