Finding the Fourth Proportional to 398,801.56, 597,978.06 and 132,419.48

Step by Step Solution

1. Step 1: Write the proportion equation
   398,801.56 : 597,978.06 = 132,419.48 : x
2. Step 2: Convert to fraction form
   398,801.56/597,978.06 = 132,419.48/x
3. Step 3: Cross multiply
   398,801.56x = 597,978.06 × 132,419.48
4. Step 4: Simplify right side
   398,801.56x = 79,183,943,756.61
5. Step 5: Solve for x
   x = 79,183,943,756.61/398,801.56
6. Step 6: Final answer
   x = 198,554.75