Finding the Fourth Proportional to 1,019.54, 1,406.76 and 571.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.54 : 1,406.76 = 571.37 : x
2. Step 2: Convert to fraction form
   1,019.54/1,406.76 = 571.37/x
3. Step 3: Cross multiply
   1,019.54x = 1,406.76 × 571.37
4. Step 4: Simplify right side
   1,019.54x = 803,780.46
5. Step 5: Solve for x
   x = 803,780.46/1,019.54
6. Step 6: Final answer
   x = 788.38