Finding the Fourth Proportional to 1,093.72, 1,639.72 and 545.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.72 : 1,639.72 = 545.62 : x
2. Step 2: Convert to fraction form
   1,093.72/1,639.72 = 545.62/x
3. Step 3: Cross multiply
   1,093.72x = 1,639.72 × 545.62
4. Step 4: Simplify right side
   1,093.72x = 894,664.03
5. Step 5: Solve for x
   x = 894,664.03/1,093.72
6. Step 6: Final answer
   x = 818.00