Finding the Fourth Proportional to 139,357.73, 192,393.46 and 91,749.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,357.73 : 192,393.46 = 91,749.47 : x
2. Step 2: Convert to fraction form
   139,357.73/192,393.46 = 91,749.47/x
3. Step 3: Cross multiply
   139,357.73x = 192,393.46 × 91,749.47
4. Step 4: Simplify right side
   139,357.73x = 17,651,997,516.60
5. Step 5: Solve for x
   x = 17,651,997,516.60/139,357.73
6. Step 6: Final answer
   x = 126,666.80