Finding the Fourth Proportional to 1,018.94, 1,406.10 and 570.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.94 : 1,406.10 = 570.83 : x
2. Step 2: Convert to fraction form
   1,018.94/1,406.10 = 570.83/x
3. Step 3: Cross multiply
   1,018.94x = 1,406.10 × 570.83
4. Step 4: Simplify right side
   1,018.94x = 802,644.06
5. Step 5: Solve for x
   x = 802,644.06/1,018.94
6. Step 6: Final answer
   x = 787.72