Finding the Fourth Proportional to 128,771.94, 193,118.61 and 89,046.30

Step by Step Solution

1. Step 1: Write the proportion equation
   128,771.94 : 193,118.61 = 89,046.30 : x
2. Step 2: Convert to fraction form
   128,771.94/193,118.61 = 89,046.30/x
3. Step 3: Cross multiply
   128,771.94x = 193,118.61 × 89,046.30
4. Step 4: Simplify right side
   128,771.94x = 17,196,497,681.64
5. Step 5: Solve for x
   x = 17,196,497,681.64/128,771.94
6. Step 6: Final answer
   x = 133,542.27