Finding the Fourth Proportional to 71,499.64, 98,664.78 and 39,667.48

Step by Step Solution

1. Step 1: Write the proportion equation
   71,499.64 : 98,664.78 = 39,667.48 : x
2. Step 2: Convert to fraction form
   71,499.64/98,664.78 = 39,667.48/x
3. Step 3: Cross multiply
   71,499.64x = 98,664.78 × 39,667.48
4. Step 4: Simplify right side
   71,499.64x = 3,913,783,187.35
5. Step 5: Solve for x
   x = 3,913,783,187.35/71,499.64
6. Step 6: Final answer
   x = 54,738.50