Finding the Fourth Proportional to 139,830.71, 192,965.39 and 76,168.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,830.71 : 192,965.39 = 76,168.50 : x
2. Step 2: Convert to fraction form
   139,830.71/192,965.39 = 76,168.50/x
3. Step 3: Cross multiply
   139,830.71x = 192,965.39 × 76,168.50
4. Step 4: Simplify right side
   139,830.71x = 14,697,884,574.81
5. Step 5: Solve for x
   x = 14,697,884,574.81/139,830.71
6. Step 6: Final answer
   x = 105,112.00