Finding the Fourth Proportional to 65,680.25, 90,447.83 and 57,062.44

Step by Step Solution

1. Step 1: Write the proportion equation
   65,680.25 : 90,447.83 = 57,062.44 : x
2. Step 2: Convert to fraction form
   65,680.25/90,447.83 = 57,062.44/x
3. Step 3: Cross multiply
   65,680.25x = 90,447.83 × 57,062.44
4. Step 4: Simplify right side
   65,680.25x = 5,161,174,021.23
5. Step 5: Solve for x
   x = 5,161,174,021.23/65,680.25
6. Step 6: Final answer
   x = 78,580.31