Finding the Fourth Proportional to 139,842.18, 192,975.60 and 79,404.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,842.18 : 192,975.60 = 79,404.96 : x
2. Step 2: Convert to fraction form
   139,842.18/192,975.60 = 79,404.96/x
3. Step 3: Cross multiply
   139,842.18x = 192,975.60 × 79,404.96
4. Step 4: Simplify right side
   139,842.18x = 15,323,219,798.98
5. Step 5: Solve for x
   x = 15,323,219,798.98/139,842.18
6. Step 6: Final answer
   x = 109,575.09