Finding the Fourth Proportional to 139,127.38, 191,995.78 and 78,696.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,127.38 : 191,995.78 = 78,696.72 : x
2. Step 2: Convert to fraction form
   139,127.38/191,995.78 = 78,696.72/x
3. Step 3: Cross multiply
   139,127.38x = 191,995.78 × 78,696.72
4. Step 4: Simplify right side
   139,127.38x = 15,109,438,139.84
5. Step 5: Solve for x
   x = 15,109,438,139.84/139,127.38
6. Step 6: Final answer
   x = 108,601.47