Finding the Fourth Proportional to 65,327.78, 89,565.41 and 64,146.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,327.78 : 89,565.41 = 64,146.80 : x
2. Step 2: Convert to fraction form
   65,327.78/89,565.41 = 64,146.80/x
3. Step 3: Cross multiply
   65,327.78x = 89,565.41 × 64,146.80
4. Step 4: Simplify right side
   65,327.78x = 5,745,334,442.19
5. Step 5: Solve for x
   x = 5,745,334,442.19/65,327.78
6. Step 6: Final answer
   x = 87,946.27