Finding the Fourth Proportional to 139,771.15, 192,884.42 and 76,109.20

Step by Step Solution

1. Step 1: Write the proportion equation
   139,771.15 : 192,884.42 = 76,109.20 : x
2. Step 2: Convert to fraction form
   139,771.15/192,884.42 = 76,109.20/x
3. Step 3: Cross multiply
   139,771.15x = 192,884.42 × 76,109.20
4. Step 4: Simplify right side
   139,771.15x = 14,680,278,898.66
5. Step 5: Solve for x
   x = 14,680,278,898.66/139,771.15
6. Step 6: Final answer
   x = 105,030.82