Finding the Fourth Proportional to 149,498.30, 206,357.64 and 89,087.89

Step by Step Solution

1. Step 1: Write the proportion equation
   149,498.30 : 206,357.64 = 89,087.89 : x
2. Step 2: Convert to fraction form
   149,498.30/206,357.64 = 89,087.89/x
3. Step 3: Cross multiply
   149,498.30x = 206,357.64 × 89,087.89
4. Step 4: Simplify right side
   149,498.30x = 18,383,966,732.98
5. Step 5: Solve for x
   x = 18,383,966,732.98/149,498.30
6. Step 6: Final answer
   x = 122,971.08