Finding the Fourth Proportional to 1,026.37, 1,543.47 and 818.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.37 : 1,543.47 = 818.61 : x
2. Step 2: Convert to fraction form
   1,026.37/1,543.47 = 818.61/x
3. Step 3: Cross multiply
   1,026.37x = 1,543.47 × 818.61
4. Step 4: Simplify right side
   1,026.37x = 1,263,499.98
5. Step 5: Solve for x
   x = 1,263,499.98/1,026.37
6. Step 6: Final answer
   x = 1,231.04