Finding the Fourth Proportional to 89,692.17, 122,878.88 and 86,329.05

Step by Step Solution

1. Step 1: Write the proportion equation
   89,692.17 : 122,878.88 = 86,329.05 : x
2. Step 2: Convert to fraction form
   89,692.17/122,878.88 = 86,329.05/x
3. Step 3: Cross multiply
   89,692.17x = 122,878.88 × 86,329.05
4. Step 4: Simplify right side
   89,692.17x = 10,608,016,543.82
5. Step 5: Solve for x
   x = 10,608,016,543.82/89,692.17
6. Step 6: Final answer
   x = 118,271.38