Finding the Fourth Proportional to 1,571.10, 2,167.98 and 907.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.10 : 2,167.98 = 907.50 : x
2. Step 2: Convert to fraction form
   1,571.10/2,167.98 = 907.50/x
3. Step 3: Cross multiply
   1,571.10x = 2,167.98 × 907.50
4. Step 4: Simplify right side
   1,571.10x = 1,967,441.85
5. Step 5: Solve for x
   x = 1,967,441.85/1,571.10
6. Step 6: Final answer
   x = 1,252.27