Finding the Fourth Proportional to 139,443.81, 192,433.94 and 75,781.60

Step by Step Solution

1. Step 1: Write the proportion equation
   139,443.81 : 192,433.94 = 75,781.60 : x
2. Step 2: Convert to fraction form
   139,443.81/192,433.94 = 75,781.60/x
3. Step 3: Cross multiply
   139,443.81x = 192,433.94 × 75,781.60
4. Step 4: Simplify right side
   139,443.81x = 14,582,951,867.50
5. Step 5: Solve for x
   x = 14,582,951,867.50/139,443.81
6. Step 6: Final answer
   x = 104,579.41