Finding the Fourth Proportional to 139,519.28, 192,631.64 and 93,647.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,519.28 : 192,631.64 = 93,647.72 : x
2. Step 2: Convert to fraction form
   139,519.28/192,631.64 = 93,647.72/x
3. Step 3: Cross multiply
   139,519.28x = 192,631.64 × 93,647.72
4. Step 4: Simplify right side
   139,519.28x = 18,039,513,885.86
5. Step 5: Solve for x
   x = 18,039,513,885.86/139,519.28
6. Step 6: Final answer
   x = 129,297.64