Finding the Fourth Proportional to 85,665.60, 118,218.42 and 47,940.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,665.60 : 118,218.42 = 47,940.12 : x
2. Step 2: Convert to fraction form
   85,665.60/118,218.42 = 47,940.12/x
3. Step 3: Cross multiply
   85,665.60x = 118,218.42 × 47,940.12
4. Step 4: Simplify right side
   85,665.60x = 5,667,405,241.01
5. Step 5: Solve for x
   x = 5,667,405,241.01/85,665.60
6. Step 6: Final answer
   x = 66,157.31