Finding the Fourth Proportional to 87,685.37, 121,005.81 and 47,399.00

Step by Step Solution

1. Step 1: Write the proportion equation
   87,685.37 : 121,005.81 = 47,399.00 : x
2. Step 2: Convert to fraction form
   87,685.37/121,005.81 = 47,399.00/x
3. Step 3: Cross multiply
   87,685.37x = 121,005.81 × 47,399.00
4. Step 4: Simplify right side
   87,685.37x = 5,735,553,783.16
5. Step 5: Solve for x
   x = 5,735,553,783.16/87,685.37
6. Step 6: Final answer
   x = 65,410.62