Finding the Fourth Proportional to 139,870.38, 193,018.66 and 76,208.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,870.38 : 193,018.66 = 76,208.62 : x
2. Step 2: Convert to fraction form
   139,870.38/193,018.66 = 76,208.62/x
3. Step 3: Cross multiply
   139,870.38x = 193,018.66 × 76,208.62
4. Step 4: Simplify right side
   139,870.38x = 14,709,685,712.85
5. Step 5: Solve for x
   x = 14,709,685,712.85/139,870.38
6. Step 6: Final answer
   x = 105,166.55