Finding the Fourth Proportional to 139,323.15, 192,296.57 and 91,580.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,323.15 : 192,296.57 = 91,580.94 : x
2. Step 2: Convert to fraction form
   139,323.15/192,296.57 = 91,580.94/x
3. Step 3: Cross multiply
   139,323.15x = 192,296.57 × 91,580.94
4. Step 4: Simplify right side
   139,323.15x = 17,610,700,181.47
5. Step 5: Solve for x
   x = 17,610,700,181.47/139,323.15
6. Step 6: Final answer
   x = 126,401.82