Finding the Fourth Proportional to 640,100.00, 883,355.83 and 353,638.55

Step by Step Solution

1. Step 1: Write the proportion equation
   640,100.00 : 883,355.83 = 353,638.55 : x
2. Step 2: Convert to fraction form
   640,100.00/883,355.83 = 353,638.55/x
3. Step 3: Cross multiply
   640,100.00x = 883,355.83 × 353,638.55
4. Step 4: Simplify right side
   640,100.00x = 312,388,676,179.54
5. Step 5: Solve for x
   x = 312,388,676,179.54/640,100.00
6. Step 6: Final answer
   x = 488,031.05