Finding the Fourth Proportional to 129,789.57, 194,863.64 and 89,709.82

Step by Step Solution

1. Step 1: Write the proportion equation
   129,789.57 : 194,863.64 = 89,709.82 : x
2. Step 2: Convert to fraction form
   129,789.57/194,863.64 = 89,709.82/x
3. Step 3: Cross multiply
   129,789.57x = 194,863.64 × 89,709.82
4. Step 4: Simplify right side
   129,789.57x = 17,481,182,068.94
5. Step 5: Solve for x
   x = 17,481,182,068.94/129,789.57
6. Step 6: Final answer
   x = 134,688.65