Finding the Fourth Proportional to 139,842.72, 192,982.91 and 76,180.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,842.72 : 192,982.91 = 76,180.50 : x
2. Step 2: Convert to fraction form
   139,842.72/192,982.91 = 76,180.50/x
3. Step 3: Cross multiply
   139,842.72x = 192,982.91 × 76,180.50
4. Step 4: Simplify right side
   139,842.72x = 14,701,534,194.35
5. Step 5: Solve for x
   x = 14,701,534,194.35/139,842.72
6. Step 6: Final answer
   x = 105,129.06