Finding the Fourth Proportional to 140,624.09, 193,878.03 and 89,618.21

Step by Step Solution

1. Step 1: Write the proportion equation
   140,624.09 : 193,878.03 = 89,618.21 : x
2. Step 2: Convert to fraction form
   140,624.09/193,878.03 = 89,618.21/x
3. Step 3: Cross multiply
   140,624.09x = 193,878.03 × 89,618.21
4. Step 4: Simplify right side
   140,624.09x = 17,375,002,006.93
5. Step 5: Solve for x
   x = 17,375,002,006.93/140,624.09
6. Step 6: Final answer
   x = 123,556.37