Finding the Fourth Proportional to 139,904.37, 193,067.39 and 76,242.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,904.37 : 193,067.39 = 76,242.15 : x
2. Step 2: Convert to fraction form
   139,904.37/193,067.39 = 76,242.15/x
3. Step 3: Cross multiply
   139,904.37x = 193,067.39 × 76,242.15
4. Step 4: Simplify right side
   139,904.37x = 14,719,873,099.09
5. Step 5: Solve for x
   x = 14,719,873,099.09/139,904.37
6. Step 6: Final answer
   x = 105,213.82