Finding the Fourth Proportional to 139,920.53, 193,084.71 and 76,256.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,920.53 : 193,084.71 = 76,256.96 : x
2. Step 2: Convert to fraction form
   139,920.53/193,084.71 = 76,256.96/x
3. Step 3: Cross multiply
   139,920.53x = 193,084.71 × 76,256.96
4. Step 4: Simplify right side
   139,920.53x = 14,724,053,007.08
5. Step 5: Solve for x
   x = 14,724,053,007.08/139,920.53
6. Step 6: Final answer
   x = 105,231.54