Finding the Fourth Proportional to 1,162.63, 1,742.72 and 545.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162.63 : 1,742.72 = 545.81 : x
2. Step 2: Convert to fraction form
   1,162.63/1,742.72 = 545.81/x
3. Step 3: Cross multiply
   1,162.63x = 1,742.72 × 545.81
4. Step 4: Simplify right side
   1,162.63x = 951,199.72
5. Step 5: Solve for x
   x = 951,199.72/1,162.63
6. Step 6: Final answer
   x = 818.15