Finding the Fourth Proportional to 57,151.32, 78,795.71 and 39,215.18

Step by Step Solution

1. Step 1: Write the proportion equation
   57,151.32 : 78,795.71 = 39,215.18 : x
2. Step 2: Convert to fraction form
   57,151.32/78,795.71 = 39,215.18/x
3. Step 3: Cross multiply
   57,151.32x = 78,795.71 × 39,215.18
4. Step 4: Simplify right side
   57,151.32x = 3,089,987,950.88
5. Step 5: Solve for x
   x = 3,089,987,950.88/57,151.32
6. Step 6: Final answer
   x = 54,066.78