Finding the Fourth Proportional to 149,608.34, 206,389.98 and 89,145.08

Step by Step Solution

1. Step 1: Write the proportion equation
   149,608.34 : 206,389.98 = 89,145.08 : x
2. Step 2: Convert to fraction form
   149,608.34/206,389.98 = 89,145.08/x
3. Step 3: Cross multiply
   149,608.34x = 206,389.98 × 89,145.08
4. Step 4: Simplify right side
   149,608.34x = 18,398,651,278.30
5. Step 5: Solve for x
   x = 18,398,651,278.30/149,608.34
6. Step 6: Final answer
   x = 122,978.78