Finding the Fourth Proportional to 1,300.80, 1,951.61 and 570.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,300.80 : 1,951.61 = 570.99 : x
2. Step 2: Convert to fraction form
   1,300.80/1,951.61 = 570.99/x
3. Step 3: Cross multiply
   1,300.80x = 1,951.61 × 570.99
4. Step 4: Simplify right side
   1,300.80x = 1,114,346.94
5. Step 5: Solve for x
   x = 1,114,346.94/1,300.80
6. Step 6: Final answer
   x = 856.66