Finding the Fourth Proportional to 139,356, 192,314.79 and 75,693.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,356 : 192,314.79 = 75,693.78 : x
2. Step 2: Convert to fraction form
   139,356/192,314.79 = 75,693.78/x
3. Step 3: Cross multiply
   139,356x = 192,314.79 × 75,693.78
4. Step 4: Simplify right side
   139,356x = 14,557,033,405.01
5. Step 5: Solve for x
   x = 14,557,033,405.01/139,356
6. Step 6: Final answer
   x = 104,459.32