Finding the Fourth Proportional to 443,300.40, 664,756.20 and 176,972.40

Step by Step Solution

1. Step 1: Write the proportion equation
   443,300.40 : 664,756.20 = 176,972.40 : x
2. Step 2: Convert to fraction form
   443,300.40/664,756.20 = 176,972.40/x
3. Step 3: Cross multiply
   443,300.40x = 664,756.20 × 176,972.40
4. Step 4: Simplify right side
   443,300.40x = 117,643,500,128.88
5. Step 5: Solve for x
   x = 117,643,500,128.88/443,300.40
6. Step 6: Final answer
   x = 265,380.99