Finding the Fourth Proportional to 139,670.42, 192,749.52 and 79,243.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,670.42 : 192,749.52 = 79,243.61 : x
2. Step 2: Convert to fraction form
   139,670.42/192,749.52 = 79,243.61/x
3. Step 3: Cross multiply
   139,670.42x = 192,749.52 × 79,243.61
4. Step 4: Simplify right side
   139,670.42x = 15,274,166,826.82
5. Step 5: Solve for x
   x = 15,274,166,826.82/139,670.42
6. Step 6: Final answer
   x = 109,358.64