Finding the Fourth Proportional to 79,692.89, 109,874.03 and 65,299.70

Step by Step Solution

1. Step 1: Write the proportion equation
   79,692.89 : 109,874.03 = 65,299.70 : x
2. Step 2: Convert to fraction form
   79,692.89/109,874.03 = 65,299.70/x
3. Step 3: Cross multiply
   79,692.89x = 109,874.03 × 65,299.70
4. Step 4: Simplify right side
   79,692.89x = 7,174,741,144.98
5. Step 5: Solve for x
   x = 7,174,741,144.98/79,692.89
6. Step 6: Final answer
   x = 90,029.88