Finding the Fourth Proportional to 139,917.82, 193,087.26 and 79,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,917.82 : 193,087.26 = 79,491.78 : x
2. Step 2: Convert to fraction form
   139,917.82/193,087.26 = 79,491.78/x
3. Step 3: Cross multiply
   139,917.82x = 193,087.26 × 79,491.78
4. Step 4: Simplify right side
   139,917.82x = 15,348,849,992.72
5. Step 5: Solve for x
   x = 15,348,849,992.72/139,917.82
6. Step 6: Final answer
   x = 109,699.04