Finding the Fourth Proportional to 139,847.17, 192,990.42 and 79,419.07

Step by Step Solution

1. Step 1: Write the proportion equation
   139,847.17 : 192,990.42 = 79,419.07 : x
2. Step 2: Convert to fraction form
   139,847.17/192,990.42 = 79,419.07/x
3. Step 3: Cross multiply
   139,847.17x = 192,990.42 × 79,419.07
4. Step 4: Simplify right side
   139,847.17x = 15,327,119,675.31
5. Step 5: Solve for x
   x = 15,327,119,675.31/139,847.17
6. Step 6: Final answer
   x = 109,599.07