Finding the Fourth Proportional to 139,906.53, 193,065.39 and 76,242.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,906.53 : 193,065.39 = 76,242.96 : x
2. Step 2: Convert to fraction form
   139,906.53/193,065.39 = 76,242.96/x
3. Step 3: Cross multiply
   139,906.53x = 193,065.39 × 76,242.96
4. Step 4: Simplify right side
   139,906.53x = 14,719,876,807.15
5. Step 5: Solve for x
   x = 14,719,876,807.15/139,906.53
6. Step 6: Final answer
   x = 105,212.22