Finding the Fourth Proportional to 139,423.41, 192,484.35 and 91,815.39

Step by Step Solution

1. Step 1: Write the proportion equation
   139,423.41 : 192,484.35 = 91,815.39 : x
2. Step 2: Convert to fraction form
   139,423.41/192,484.35 = 91,815.39/x
3. Step 3: Cross multiply
   139,423.41x = 192,484.35 × 91,815.39
4. Step 4: Simplify right side
   139,423.41x = 17,673,025,664.15
5. Step 5: Solve for x
   x = 17,673,025,664.15/139,423.41
6. Step 6: Final answer
   x = 126,757.95