Finding the Fourth Proportional to 1,098.31, 1,645.83 and 549.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,098.31 : 1,645.83 = 549.67 : x
2. Step 2: Convert to fraction form
   1,098.31/1,645.83 = 549.67/x
3. Step 3: Cross multiply
   1,098.31x = 1,645.83 × 549.67
4. Step 4: Simplify right side
   1,098.31x = 904,663.38
5. Step 5: Solve for x
   x = 904,663.38/1,098.31
6. Step 6: Final answer
   x = 823.69