Finding the Fourth Proportional to 139,478.02, 192,473.46 and 79,045.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,478.02 : 192,473.46 = 79,045.12 : x
2. Step 2: Convert to fraction form
   139,478.02/192,473.46 = 79,045.12/x
3. Step 3: Cross multiply
   139,478.02x = 192,473.46 × 79,045.12
4. Step 4: Simplify right side
   139,478.02x = 15,214,087,742.52
5. Step 5: Solve for x
   x = 15,214,087,742.52/139,478.02
6. Step 6: Final answer
   x = 109,078.75