Finding the Fourth Proportional to 89,705.95, 123,771.85 and 57,836.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,705.95 : 123,771.85 = 57,836.50 : x
2. Step 2: Convert to fraction form
   89,705.95/123,771.85 = 57,836.50/x
3. Step 3: Cross multiply
   89,705.95x = 123,771.85 × 57,836.50
4. Step 4: Simplify right side
   89,705.95x = 7,158,530,602.53
5. Step 5: Solve for x
   x = 7,158,530,602.53/89,705.95
6. Step 6: Final answer
   x = 79,799.95