Finding the Fourth Proportional to 139,443.18, 192,431.01 and 79,025.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.18 : 192,431.01 = 79,025.31 : x
2. Step 2: Convert to fraction form
   139,443.18/192,431.01 = 79,025.31/x
3. Step 3: Cross multiply
   139,443.18x = 192,431.01 × 79,025.31
4. Step 4: Simplify right side
   139,443.18x = 15,206,920,218.86
5. Step 5: Solve for x
   x = 15,206,920,218.86/139,443.18
6. Step 6: Final answer
   x = 109,054.60