Finding the Fourth Proportional to 139,688.98, 192,811.48 and 91,297.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,688.98 : 192,811.48 = 91,297.96 : x
2. Step 2: Convert to fraction form
   139,688.98/192,811.48 = 91,297.96/x
3. Step 3: Cross multiply
   139,688.98x = 192,811.48 × 91,297.96
4. Step 4: Simplify right side
   139,688.98x = 17,603,294,788.58
5. Step 5: Solve for x
   x = 17,603,294,788.58/139,688.98
6. Step 6: Final answer
   x = 126,017.78