Finding the Fourth Proportional to 683,356.83, 1,026,088.69 and 578,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   683,356.83 : 1,026,088.69 = 578,123.56 : x
2. Step 2: Convert to fraction form
   683,356.83/1,026,088.69 = 578,123.56/x
3. Step 3: Cross multiply
   683,356.83x = 1,026,088.69 × 578,123.56
4. Step 4: Simplify right side
   683,356.83x = 593,206,046,338.54
5. Step 5: Solve for x
   x = 593,206,046,338.54/683,356.83
6. Step 6: Final answer
   x = 868,076.56