Finding the Fourth Proportional to 89,370.49, 123,300.41 and 57,123.97

Step by Step Solution

1. Step 1: Write the proportion equation
   89,370.49 : 123,300.41 = 57,123.97 : x
2. Step 2: Convert to fraction form
   89,370.49/123,300.41 = 57,123.97/x
3. Step 3: Cross multiply
   89,370.49x = 123,300.41 × 57,123.97
4. Step 4: Simplify right side
   89,370.49x = 7,043,408,921.83
5. Step 5: Solve for x
   x = 7,043,408,921.83/89,370.49
6. Step 6: Final answer
   x = 78,811.35