Finding the Fourth Proportional to 129,663.75, 194,448.86 and 54,789.69

Step by Step Solution

1. Step 1: Write the proportion equation
   129,663.75 : 194,448.86 = 54,789.69 : x
2. Step 2: Convert to fraction form
   129,663.75/194,448.86 = 54,789.69/x
3. Step 3: Cross multiply
   129,663.75x = 194,448.86 × 54,789.69
4. Step 4: Simplify right side
   129,663.75x = 10,653,792,486.31
5. Step 5: Solve for x
   x = 10,653,792,486.31/129,663.75
6. Step 6: Final answer
   x = 82,164.78