Finding the Fourth Proportional to 89,999.36, 123,119.76 and 89,620.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,999.36 : 123,119.76 = 89,620.28 : x
2. Step 2: Convert to fraction form
   89,999.36/123,119.76 = 89,620.28/x
3. Step 3: Cross multiply
   89,999.36x = 123,119.76 × 89,620.28
4. Step 4: Simplify right side
   89,999.36x = 11,034,027,364.73
5. Step 5: Solve for x
   x = 11,034,027,364.73/89,999.36
6. Step 6: Final answer
   x = 122,601.18