Finding the Fourth Proportional to 647,105.40, 893,014.20 and 360,615.69

Step by Step Solution

1. Step 1: Write the proportion equation
   647,105.40 : 893,014.20 = 360,615.69 : x
2. Step 2: Convert to fraction form
   647,105.40/893,014.20 = 360,615.69/x
3. Step 3: Cross multiply
   647,105.40x = 893,014.20 × 360,615.69
4. Step 4: Simplify right side
   647,105.40x = 322,034,931,912.80
5. Step 5: Solve for x
   x = 322,034,931,912.80/647,105.40
6. Step 6: Final answer
   x = 497,654.53