Finding the Fourth Proportional to 1,571.78, 2,171.00 and 1,151.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.78 : 2,171.00 = 1,151.48 : x
2. Step 2: Convert to fraction form
   1,571.78/2,171.00 = 1,151.48/x
3. Step 3: Cross multiply
   1,571.78x = 2,171.00 × 1,151.48
4. Step 4: Simplify right side
   1,571.78x = 2,499,846.47
5. Step 5: Solve for x
   x = 2,499,846.47/1,571.78
6. Step 6: Final answer
   x = 1,590.46