Finding the Fourth Proportional to 139,446.30, 192,428.52 and 79,017.67

Step by Step Solution

1. Step 1: Write the proportion equation
   139,446.30 : 192,428.52 = 79,017.67 : x
2. Step 2: Convert to fraction form
   139,446.30/192,428.52 = 79,017.67/x
3. Step 3: Cross multiply
   139,446.30x = 192,428.52 × 79,017.67
4. Step 4: Simplify right side
   139,446.30x = 15,205,253,291.95
5. Step 5: Solve for x
   x = 15,205,253,291.95/139,446.30
6. Step 6: Final answer
   x = 109,040.21