Finding the Fourth Proportional to 429,962.72, 645,021.63 and 177,105.17

Step by Step Solution

1. Step 1: Write the proportion equation
   429,962.72 : 645,021.63 = 177,105.17 : x
2. Step 2: Convert to fraction form
   429,962.72/645,021.63 = 177,105.17/x
3. Step 3: Cross multiply
   429,962.72x = 645,021.63 × 177,105.17
4. Step 4: Simplify right side
   429,962.72x = 114,236,662,209.72
5. Step 5: Solve for x
   x = 114,236,662,209.72/429,962.72
6. Step 6: Final answer
   x = 265,689.69