Finding the Fourth Proportional to 85,868.68, 118,499.88 and 47,629.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,868.68 : 118,499.88 = 47,629.12 : x
2. Step 2: Convert to fraction form
   85,868.68/118,499.88 = 47,629.12/x
3. Step 3: Cross multiply
   85,868.68x = 118,499.88 × 47,629.12
4. Step 4: Simplify right side
   85,868.68x = 5,644,045,004.51
5. Step 5: Solve for x
   x = 5,644,045,004.51/85,868.68
6. Step 6: Final answer
   x = 65,728.80