Finding the Fourth Proportional to 129,789.07, 194,862.89 and 89,709.32

Step by Step Solution

1. Step 1: Write the proportion equation
   129,789.07 : 194,862.89 = 89,709.32 : x
2. Step 2: Convert to fraction form
   129,789.07/194,862.89 = 89,709.32/x
3. Step 3: Cross multiply
   129,789.07x = 194,862.89 × 89,709.32
4. Step 4: Simplify right side
   129,789.07x = 17,481,016,906.59
5. Step 5: Solve for x
   x = 17,481,016,906.59/129,789.07
6. Step 6: Final answer
   x = 134,687.90