Finding the Fourth Proportional to 139,478.83, 192,573.47 and 107,155.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,478.83 : 192,573.47 = 107,155.88 : x
2. Step 2: Convert to fraction form
   139,478.83/192,573.47 = 107,155.88/x
3. Step 3: Cross multiply
   139,478.83x = 192,573.47 × 107,155.88
4. Step 4: Simplify right side
   139,478.83x = 20,635,379,066.92
5. Step 5: Solve for x
   x = 20,635,379,066.92/139,478.83
6. Step 6: Final answer
   x = 147,946.32