Finding the Fourth Proportional to 89,368.49, 123,297.65 and 57,121.97

Step by Step Solution

1. Step 1: Write the proportion equation
   89,368.49 : 123,297.65 = 57,121.97 : x
2. Step 2: Convert to fraction form
   89,368.49/123,297.65 = 57,121.97/x
3. Step 3: Cross multiply
   89,368.49x = 123,297.65 × 57,121.97
4. Step 4: Simplify right side
   89,368.49x = 7,043,003,976.48
5. Step 5: Solve for x
   x = 7,043,003,976.48/89,368.49
6. Step 6: Final answer
   x = 78,808.58