Finding the Fourth Proportional to 89,685.75, 123,769.62 and 55,713

Step by Step Solution

1. Step 1: Write the proportion equation
   89,685.75 : 123,769.62 = 55,713 : x
2. Step 2: Convert to fraction form
   89,685.75/123,769.62 = 55,713/x
3. Step 3: Cross multiply
   89,685.75x = 123,769.62 × 55,713
4. Step 4: Simplify right side
   89,685.75x = 6,895,576,839.06
5. Step 5: Solve for x
   x = 6,895,576,839.06/89,685.75
6. Step 6: Final answer
   x = 76,885.98