Finding the Fourth Proportional to 89,090.69, 122,898.51 and 55,088.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89,090.69 : 122,898.51 = 55,088.28 : x
2. Step 2: Convert to fraction form
   89,090.69/122,898.51 = 55,088.28/x
3. Step 3: Cross multiply
   89,090.69x = 122,898.51 × 55,088.28
4. Step 4: Simplify right side
   89,090.69x = 6,770,267,530.46
5. Step 5: Solve for x
   x = 6,770,267,530.46/89,090.69
6. Step 6: Final answer
   x = 75,992.99