Finding the Fourth Proportional to 139,479.72, 192,638.82 and 108,029.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,479.72 : 192,638.82 = 108,029.16 : x
2. Step 2: Convert to fraction form
   139,479.72/192,638.82 = 108,029.16/x
3. Step 3: Cross multiply
   139,479.72x = 192,638.82 × 108,029.16
4. Step 4: Simplify right side
   139,479.72x = 20,810,609,907.99
5. Step 5: Solve for x
   x = 20,810,609,907.99/139,479.72
6. Step 6: Final answer
   x = 149,201.69