Finding the Fourth Proportional to 258,283.98, 387,404.10 and 89,761.05

Step by Step Solution

1. Step 1: Write the proportion equation
   258,283.98 : 387,404.10 = 89,761.05 : x
2. Step 2: Convert to fraction form
   258,283.98/387,404.10 = 89,761.05/x
3. Step 3: Cross multiply
   258,283.98x = 387,404.10 × 89,761.05
4. Step 4: Simplify right side
   258,283.98x = 34,773,798,790.31
5. Step 5: Solve for x
   x = 34,773,798,790.31/258,283.98
6. Step 6: Final answer
   x = 134,633.97