Finding the Fourth Proportional to 1,129.34, 1,693.98 and 1,098.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,129.34 : 1,693.98 = 1,098.56 : x
2. Step 2: Convert to fraction form
   1,129.34/1,693.98 = 1,098.56/x
3. Step 3: Cross multiply
   1,129.34x = 1,693.98 × 1,098.56
4. Step 4: Simplify right side
   1,129.34x = 1,860,942.90
5. Step 5: Solve for x
   x = 1,860,942.90/1,129.34
6. Step 6: Final answer
   x = 1,647.81