Finding the Fourth Proportional to 1,028,610.72, 1,419,493.23 and 620,633.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,028,610.72 : 1,419,493.23 = 620,633.61 : x
2. Step 2: Convert to fraction form
   1,028,610.72/1,419,493.23 = 620,633.61/x
3. Step 3: Cross multiply
   1,028,610.72x = 1,419,493.23 × 620,633.61
4. Step 4: Simplify right side
   1,028,610.72x = 880,985,207,705.46
5. Step 5: Solve for x
   x = 880,985,207,705.46/1,028,610.72
6. Step 6: Final answer
   x = 856,480.68