Finding the Fourth Proportional to 1,570.04, 2,167.59 and 1,215.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.04 : 2,167.59 = 1,215.26 : x
2. Step 2: Convert to fraction form
   1,570.04/2,167.59 = 1,215.26/x
3. Step 3: Cross multiply
   1,570.04x = 2,167.59 × 1,215.26
4. Step 4: Simplify right side
   1,570.04x = 2,634,185.42
5. Step 5: Solve for x
   x = 2,634,185.42/1,570.04
6. Step 6: Final answer
   x = 1,677.78