Finding the Fourth Proportional to 123,818.24, 170,909.82 and 72,828.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,818.24 : 170,909.82 = 72,828.76 : x
2. Step 2: Convert to fraction form
   123,818.24/170,909.82 = 72,828.76/x
3. Step 3: Cross multiply
   123,818.24x = 170,909.82 × 72,828.76
4. Step 4: Simplify right side
   123,818.24x = 12,447,150,262.42
5. Step 5: Solve for x
   x = 12,447,150,262.42/123,818.24
6. Step 6: Final answer
   x = 100,527.60