Finding the Fourth Proportional to 1,570.86, 2,168.01 and 908.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.86 : 2,168.01 = 908.10 : x
2. Step 2: Convert to fraction form
   1,570.86/2,168.01 = 908.10/x
3. Step 3: Cross multiply
   1,570.86x = 2,168.01 × 908.10
4. Step 4: Simplify right side
   1,570.86x = 1,968,769.88
5. Step 5: Solve for x
   x = 1,968,769.88/1,570.86
6. Step 6: Final answer
   x = 1,253.31