Finding the Fourth Proportional to 1,570.98, 2,167.80 and 908.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.98 : 2,167.80 = 908.05 : x
2. Step 2: Convert to fraction form
   1,570.98/2,167.80 = 908.05/x
3. Step 3: Cross multiply
   1,570.98x = 2,167.80 × 908.05
4. Step 4: Simplify right side
   1,570.98x = 1,968,466.25
5. Step 5: Solve for x
   x = 1,968,466.25/1,570.98
6. Step 6: Final answer
   x = 1,253.02