Finding the Fourth Proportional to 1,012.86, 1,519.02 and 719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.86 : 1,519.02 = 719.50 : x
2. Step 2: Convert to fraction form
   1,012.86/1,519.02 = 719.50/x
3. Step 3: Cross multiply
   1,012.86x = 1,519.02 × 719.50
4. Step 4: Simplify right side
   1,012.86x = 1,092,934.89
5. Step 5: Solve for x
   x = 1,092,934.89/1,012.86
6. Step 6: Final answer
   x = 1,079.06