Finding the Fourth Proportional to 57,188.58, 78,851.61 and 49,217.10

Step by Step Solution

1. Step 1: Write the proportion equation
   57,188.58 : 78,851.61 = 49,217.10 : x
2. Step 2: Convert to fraction form
   57,188.58/78,851.61 = 49,217.10/x
3. Step 3: Cross multiply
   57,188.58x = 78,851.61 × 49,217.10
4. Step 4: Simplify right side
   57,188.58x = 3,880,847,574.53
5. Step 5: Solve for x
   x = 3,880,847,574.53/57,188.58
6. Step 6: Final answer
   x = 67,860.53