Finding the Fourth Proportional to 139,629.24, 192,804.69 and 129,498.66

Step by Step Solution

1. Step 1: Write the proportion equation
   139,629.24 : 192,804.69 = 129,498.66 : x
2. Step 2: Convert to fraction form
   139,629.24/192,804.69 = 129,498.66/x
3. Step 3: Cross multiply
   139,629.24x = 192,804.69 × 129,498.66
4. Step 4: Simplify right side
   139,629.24x = 24,967,948,996.72
5. Step 5: Solve for x
   x = 24,967,948,996.72/139,629.24
6. Step 6: Final answer
   x = 178,816.05