Finding the Fourth Proportional to 139,976.39, 193,168.55 and 76,314.65

Step by Step Solution

1. Step 1: Write the proportion equation
   139,976.39 : 193,168.55 = 76,314.65 : x
2. Step 2: Convert to fraction form
   139,976.39/193,168.55 = 76,314.65/x
3. Step 3: Cross multiply
   139,976.39x = 193,168.55 × 76,314.65
4. Step 4: Simplify right side
   139,976.39x = 14,741,588,936.84
5. Step 5: Solve for x
   x = 14,741,588,936.84/139,976.39
6. Step 6: Final answer
   x = 105,314.83