Finding the Fourth Proportional to 139,904.46, 193,067.82 and 76,242.09

Step by Step Solution

1. Step 1: Write the proportion equation
   139,904.46 : 193,067.82 = 76,242.09 : x
2. Step 2: Convert to fraction form
   139,904.46/193,067.82 = 76,242.09/x
3. Step 3: Cross multiply
   139,904.46x = 193,067.82 × 76,242.09
4. Step 4: Simplify right side
   139,904.46x = 14,719,894,108.54
5. Step 5: Solve for x
   x = 14,719,894,108.54/139,904.46
6. Step 6: Final answer
   x = 105,213.90