Finding the Fourth Proportional to 69,667.59, 96,147.20 and 39,458.28

Step by Step Solution

1. Step 1: Write the proportion equation
   69,667.59 : 96,147.20 = 39,458.28 : x
2. Step 2: Convert to fraction form
   69,667.59/96,147.20 = 39,458.28/x
3. Step 3: Cross multiply
   69,667.59x = 96,147.20 × 39,458.28
4. Step 4: Simplify right side
   69,667.59x = 3,793,803,280.54
5. Step 5: Solve for x
   x = 3,793,803,280.54/69,667.59
6. Step 6: Final answer
   x = 54,455.79