Finding the Fourth Proportional to 1,779.18, 2,667.85 and 999.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,779.18 : 2,667.85 = 999.71 : x
2. Step 2: Convert to fraction form
   1,779.18/2,667.85 = 999.71/x
3. Step 3: Cross multiply
   1,779.18x = 2,667.85 × 999.71
4. Step 4: Simplify right side
   1,779.18x = 2,667,080.49
5. Step 5: Solve for x
   x = 2,667,080.49/1,779.18
6. Step 6: Final answer
   x = 1,499.05