Finding the Fourth Proportional to 89,020.72, 122,854.50 and 51,297.40

Step by Step Solution

1. Step 1: Write the proportion equation
   89,020.72 : 122,854.50 = 51,297.40 : x
2. Step 2: Convert to fraction form
   89,020.72/122,854.50 = 51,297.40/x
3. Step 3: Cross multiply
   89,020.72x = 122,854.50 × 51,297.40
4. Step 4: Simplify right side
   89,020.72x = 6,302,116,428.30
5. Step 5: Solve for x
   x = 6,302,116,428.30/89,020.72
6. Step 6: Final answer
   x = 70,793.82