Finding the Fourth Proportional to 112,466.20, 168,672.30 and 64,978.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,466.20 : 168,672.30 = 64,978.60 : x
2. Step 2: Convert to fraction form
   112,466.20/168,672.30 = 64,978.60/x
3. Step 3: Cross multiply
   112,466.20x = 168,672.30 × 64,978.60
4. Step 4: Simplify right side
   112,466.20x = 10,960,089,912.78
5. Step 5: Solve for x
   x = 10,960,089,912.78/112,466.20
6. Step 6: Final answer
   x = 97,452.30