Finding the Fourth Proportional to 639,691, 882,851.34 and 371,419

Step by Step Solution

1. Step 1: Write the proportion equation
   639,691 : 882,851.34 = 371,419 : x
2. Step 2: Convert to fraction form
   639,691/882,851.34 = 371,419/x
3. Step 3: Cross multiply
   639,691x = 882,851.34 × 371,419
4. Step 4: Simplify right side
   639,691x = 327,907,761,851.46
5. Step 5: Solve for x
   x = 327,907,761,851.46/639,691
6. Step 6: Final answer
   x = 512,603.37