Finding the Fourth Proportional to 639,505.72, 882,518.05 and 353,026

Step by Step Solution

1. Step 1: Write the proportion equation
   639,505.72 : 882,518.05 = 353,026 : x
2. Step 2: Convert to fraction form
   639,505.72/882,518.05 = 353,026/x
3. Step 3: Cross multiply
   639,505.72x = 882,518.05 × 353,026
4. Step 4: Simplify right side
   639,505.72x = 311,551,817,119.30
5. Step 5: Solve for x
   x = 311,551,817,119.30/639,505.72
6. Step 6: Final answer
   x = 487,175.97