Finding the Fourth Proportional to 57,978.96, 86,933.52 and 31,647.12

Step by Step Solution

1. Step 1: Write the proportion equation
   57,978.96 : 86,933.52 = 31,647.12 : x
2. Step 2: Convert to fraction form
   57,978.96/86,933.52 = 31,647.12/x
3. Step 3: Cross multiply
   57,978.96x = 86,933.52 × 31,647.12
4. Step 4: Simplify right side
   57,978.96x = 2,751,195,539.46
5. Step 5: Solve for x
   x = 2,751,195,539.46/57,978.96
6. Step 6: Final answer
   x = 47,451.62