Finding the Fourth Proportional to 139,314.15, 192,284.15 and 91,571.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,314.15 : 192,284.15 = 91,571.94 : x
2. Step 2: Convert to fraction form
   139,314.15/192,284.15 = 91,571.94/x
3. Step 3: Cross multiply
   139,314.15x = 192,284.15 × 91,571.94
4. Step 4: Simplify right side
   139,314.15x = 17,607,832,188.89
5. Step 5: Solve for x
   x = 17,607,832,188.89/139,314.15
6. Step 6: Final answer
   x = 126,389.40