Finding the Fourth Proportional to 89,766.96, 123,821.64 and 64,222.80

Step by Step Solution

1. Step 1: Write the proportion equation
   89,766.96 : 123,821.64 = 64,222.80 : x
2. Step 2: Convert to fraction form
   89,766.96/123,821.64 = 64,222.80/x
3. Step 3: Cross multiply
   89,766.96x = 123,821.64 × 64,222.80
4. Step 4: Simplify right side
   89,766.96x = 7,952,172,421.39
5. Step 5: Solve for x
   x = 7,952,172,421.39/89,766.96
6. Step 6: Final answer
   x = 88,586.85