Finding the Fourth Proportional to 260,591.58, 390,936.87 and 89,767.98

Step by Step Solution

1. Step 1: Write the proportion equation
   260,591.58 : 390,936.87 = 89,767.98 : x
2. Step 2: Convert to fraction form
   260,591.58/390,936.87 = 89,767.98/x
3. Step 3: Cross multiply
   260,591.58x = 390,936.87 × 89,767.98
4. Step 4: Simplify right side
   260,591.58x = 35,093,613,127.42
5. Step 5: Solve for x
   x = 35,093,613,127.42/260,591.58
6. Step 6: Final answer
   x = 134,669.02