Finding the Fourth Proportional to 1,434.69, 1,979.90 and 1,015.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,434.69 : 1,979.90 = 1,015.76 : x
2. Step 2: Convert to fraction form
   1,434.69/1,979.90 = 1,015.76/x
3. Step 3: Cross multiply
   1,434.69x = 1,979.90 × 1,015.76
4. Step 4: Simplify right side
   1,434.69x = 2,011,106.90
5. Step 5: Solve for x
   x = 2,011,106.90/1,434.69
6. Step 6: Final answer
   x = 1,401.77