Finding the Fourth Proportional to 139,906.09, 193,064.79 and 76,242.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,906.09 : 193,064.79 = 76,242.52 : x
2. Step 2: Convert to fraction form
   139,906.09/193,064.79 = 76,242.52/x
3. Step 3: Cross multiply
   139,906.09x = 193,064.79 × 76,242.52
4. Step 4: Simplify right side
   139,906.09x = 14,719,746,112.87
5. Step 5: Solve for x
   x = 14,719,746,112.87/139,906.09
6. Step 6: Final answer
   x = 105,211.62