Finding the Fourth Proportional to 402,196.60, 603,513.60 and 165,563.20

Step by Step Solution

1. Step 1: Write the proportion equation
   402,196.60 : 603,513.60 = 165,563.20 : x
2. Step 2: Convert to fraction form
   402,196.60/603,513.60 = 165,563.20/x
3. Step 3: Cross multiply
   402,196.60x = 603,513.60 × 165,563.20
4. Step 4: Simplify right side
   402,196.60x = 99,919,642,859.52
5. Step 5: Solve for x
   x = 99,919,642,859.52/402,196.60
6. Step 6: Final answer
   x = 248,434.83