Finding the Fourth Proportional to 410,016.32, 615,022.56 and 129,533.12

Step by Step Solution

1. Step 1: Write the proportion equation
   410,016.32 : 615,022.56 = 129,533.12 : x
2. Step 2: Convert to fraction form
   410,016.32/615,022.56 = 129,533.12/x
3. Step 3: Cross multiply
   410,016.32x = 615,022.56 × 129,533.12
4. Step 4: Simplify right side
   410,016.32x = 79,665,791,067.19
5. Step 5: Solve for x
   x = 79,665,791,067.19/410,016.32
6. Step 6: Final answer
   x = 194,299.07