Finding the Fourth Proportional to 89,367.96, 123,333.42 and 51,139.20

Step by Step Solution

1. Step 1: Write the proportion equation
   89,367.96 : 123,333.42 = 51,139.20 : x
2. Step 2: Convert to fraction form
   89,367.96/123,333.42 = 51,139.20/x
3. Step 3: Cross multiply
   89,367.96x = 123,333.42 × 51,139.20
4. Step 4: Simplify right side
   89,367.96x = 6,307,172,432.06
5. Step 5: Solve for x
   x = 6,307,172,432.06/89,367.96
6. Step 6: Final answer
   x = 70,575.32