Finding the Fourth Proportional to 89,357.69, 123,315.68 and 51,120.83

Step by Step Solution

1. Step 1: Write the proportion equation
   89,357.69 : 123,315.68 = 51,120.83 : x
2. Step 2: Convert to fraction form
   89,357.69/123,315.68 = 51,120.83/x
3. Step 3: Cross multiply
   89,357.69x = 123,315.68 × 51,120.83
4. Step 4: Simplify right side
   89,357.69x = 6,303,999,913.61
5. Step 5: Solve for x
   x = 6,303,999,913.61/89,357.69
6. Step 6: Final answer
   x = 70,547.93