Finding the Fourth Proportional to 89,231.35, 123,139.25 and 51,505.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89,231.35 : 123,139.25 = 51,505.60 : x
2. Step 2: Convert to fraction form
   89,231.35/123,139.25 = 51,505.60/x
3. Step 3: Cross multiply
   89,231.35x = 123,139.25 × 51,505.60
4. Step 4: Simplify right side
   89,231.35x = 6,342,360,775.72
5. Step 5: Solve for x
   x = 6,342,360,775.72/89,231.35
6. Step 6: Final answer
   x = 71,077.72