Finding the Fourth Proportional to 1,019.05, 1,406.36 and 570.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.05 : 1,406.36 = 570.96 : x
2. Step 2: Convert to fraction form
   1,019.05/1,406.36 = 570.96/x
3. Step 3: Cross multiply
   1,019.05x = 1,406.36 × 570.96
4. Step 4: Simplify right side
   1,019.05x = 802,975.31
5. Step 5: Solve for x
   x = 802,975.31/1,019.05
6. Step 6: Final answer
   x = 787.96