Finding the Fourth Proportional to 139,841.46, 192,980.88 and 76,179.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,841.46 : 192,980.88 = 76,179.78 : x
2. Step 2: Convert to fraction form
   139,841.46/192,980.88 = 76,179.78/x
3. Step 3: Cross multiply
   139,841.46x = 192,980.88 × 76,179.78
4. Step 4: Simplify right side
   139,841.46x = 14,701,240,982.61
5. Step 5: Solve for x
   x = 14,701,240,982.61/139,841.46
6. Step 6: Final answer
   x = 105,127.91