Finding the Fourth Proportional to 200,016.74, 275,803.16 and 128,369.54

Step by Step Solution

1. Step 1: Write the proportion equation
   200,016.74 : 275,803.16 = 128,369.54 : x
2. Step 2: Convert to fraction form
   200,016.74/275,803.16 = 128,369.54/x
3. Step 3: Cross multiply
   200,016.74x = 275,803.16 × 128,369.54
4. Step 4: Simplify right side
   200,016.74x = 35,404,724,779.75
5. Step 5: Solve for x
   x = 35,404,724,779.75/200,016.74
6. Step 6: Final answer
   x = 177,008.81