Finding the Fourth Proportional to 89,722.08, 123,789.06 and 51,989.04

Step by Step Solution

1. Step 1: Write the proportion equation
   89,722.08 : 123,789.06 = 51,989.04 : x
2. Step 2: Convert to fraction form
   89,722.08/123,789.06 = 51,989.04/x
3. Step 3: Cross multiply
   89,722.08x = 123,789.06 × 51,989.04
4. Step 4: Simplify right side
   89,722.08x = 6,435,674,391.90
5. Step 5: Solve for x
   x = 6,435,674,391.90/89,722.08
6. Step 6: Final answer
   x = 71,728.99