Finding the Fourth Proportional to 139,333.81, 192,360.35 and 91,725.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,333.81 : 192,360.35 = 91,725.55 : x
2. Step 2: Convert to fraction form
   139,333.81/192,360.35 = 91,725.55/x
3. Step 3: Cross multiply
   139,333.81x = 192,360.35 × 91,725.55
4. Step 4: Simplify right side
   139,333.81x = 17,644,358,650.36
5. Step 5: Solve for x
   x = 17,644,358,650.36/139,333.81
6. Step 6: Final answer
   x = 126,633.72