Finding the Fourth Proportional to 647,776.77, 893,469.15 and 561,581.61

Step by Step Solution

1. Step 1: Write the proportion equation
   647,776.77 : 893,469.15 = 561,581.61 : x
2. Step 2: Convert to fraction form
   647,776.77/893,469.15 = 561,581.61/x
3. Step 3: Cross multiply
   647,776.77x = 893,469.15 × 561,581.61
4. Step 4: Simplify right side
   647,776.77x = 501,755,843,742.33
5. Step 5: Solve for x
   x = 501,755,843,742.33/647,776.77
6. Step 6: Final answer
   x = 774,581.41