Finding the Fourth Proportional to 123,781.42, 170,818.20 and 67,192.78

Step by Step Solution

1. Step 1: Write the proportion equation
   123,781.42 : 170,818.20 = 67,192.78 : x
2. Step 2: Convert to fraction form
   123,781.42/170,818.20 = 67,192.78/x
3. Step 3: Cross multiply
   123,781.42x = 170,818.20 × 67,192.78
4. Step 4: Simplify right side
   123,781.42x = 11,477,749,732.60
5. Step 5: Solve for x
   x = 11,477,749,732.60/123,781.42
6. Step 6: Final answer
   x = 92,725.95