Finding the Fourth Proportional to 647,572.50, 893,650.05 and 379,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   647,572.50 : 893,650.05 = 379,300.50 : x
2. Step 2: Convert to fraction form
   647,572.50/893,650.05 = 379,300.50/x
3. Step 3: Cross multiply
   647,572.50x = 893,650.05 × 379,300.50
4. Step 4: Simplify right side
   647,572.50x = 338,961,910,790.03
5. Step 5: Solve for x
   x = 338,961,910,790.03/647,572.50
6. Step 6: Final answer
   x = 523,434.69