Finding the Fourth Proportional to 2,095.34, 3,143.41 and 999.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,095.34 : 3,143.41 = 999.78 : x
2. Step 2: Convert to fraction form
   2,095.34/3,143.41 = 999.78/x
3. Step 3: Cross multiply
   2,095.34x = 3,143.41 × 999.78
4. Step 4: Simplify right side
   2,095.34x = 3,142,713.45
5. Step 5: Solve for x
   x = 3,142,713.45/2,095.34
6. Step 6: Final answer
   x = 1,499.86