Finding the Fourth Proportional to 999.94, 1,499.29 and 871.15

Step by Step Solution

1. Step 1: Write the proportion equation
   999.94 : 1,499.29 = 871.15 : x
2. Step 2: Convert to fraction form
   999.94/1,499.29 = 871.15/x
3. Step 3: Cross multiply
   999.94x = 1,499.29 × 871.15
4. Step 4: Simplify right side
   999.94x = 1,306,106.48
5. Step 5: Solve for x
   x = 1,306,106.48/999.94
6. Step 6: Final answer
   x = 1,306.18