Finding the Fourth Proportional to 2,109.88, 3,164.86 and 549.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.88 : 3,164.86 = 549.79 : x
2. Step 2: Convert to fraction form
   2,109.88/3,164.86 = 549.79/x
3. Step 3: Cross multiply
   2,109.88x = 3,164.86 × 549.79
4. Step 4: Simplify right side
   2,109.88x = 1,739,998.06
5. Step 5: Solve for x
   x = 1,739,998.06/2,109.88
6. Step 6: Final answer
   x = 824.69