Finding the Fourth Proportional to 123,780.46, 170,815.86 and 67,191.76

Step by Step Solution

1. Step 1: Write the proportion equation
   123,780.46 : 170,815.86 = 67,191.76 : x
2. Step 2: Convert to fraction form
   123,780.46/170,815.86 = 67,191.76/x
3. Step 3: Cross multiply
   123,780.46x = 170,815.86 × 67,191.76
4. Step 4: Simplify right side
   123,780.46x = 11,477,418,269.31
5. Step 5: Solve for x
   x = 11,477,418,269.31/123,780.46
6. Step 6: Final answer
   x = 92,723.99