Finding the Fourth Proportional to 128,500.96, 192,647.52 and 53,678.41

Step by Step Solution

1. Step 1: Write the proportion equation
   128,500.96 : 192,647.52 = 53,678.41 : x
2. Step 2: Convert to fraction form
   128,500.96/192,647.52 = 53,678.41/x
3. Step 3: Cross multiply
   128,500.96x = 192,647.52 × 53,678.41
4. Step 4: Simplify right side
   128,500.96x = 10,341,012,564.04
5. Step 5: Solve for x
   x = 10,341,012,564.04/128,500.96
6. Step 6: Final answer
   x = 80,474.20