Finding the Fourth Proportional to 1,570.67, 2,167.50 and 862.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.67 : 2,167.50 = 862.53 : x
2. Step 2: Convert to fraction form
   1,570.67/2,167.50 = 862.53/x
3. Step 3: Cross multiply
   1,570.67x = 2,167.50 × 862.53
4. Step 4: Simplify right side
   1,570.67x = 1,869,533.78
5. Step 5: Solve for x
   x = 1,869,533.78/1,570.67
6. Step 6: Final answer
   x = 1,190.28