Finding the Fourth Proportional to 139,821, 192,967.56 and 79,407.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,821 : 192,967.56 = 79,407.96 : x
2. Step 2: Convert to fraction form
   139,821/192,967.56 = 79,407.96/x
3. Step 3: Cross multiply
   139,821x = 192,967.56 × 79,407.96
4. Step 4: Simplify right side
   139,821x = 15,323,160,285.78
5. Step 5: Solve for x
   x = 15,323,160,285.78/139,821
6. Step 6: Final answer
   x = 109,591.27