Finding the Fourth Proportional to 1,570.52, 2,167.10 and 898.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.52 : 2,167.10 = 898.22 : x
2. Step 2: Convert to fraction form
   1,570.52/2,167.10 = 898.22/x
3. Step 3: Cross multiply
   1,570.52x = 2,167.10 × 898.22
4. Step 4: Simplify right side
   1,570.52x = 1,946,532.56
5. Step 5: Solve for x
   x = 1,946,532.56/1,570.52
6. Step 6: Final answer
   x = 1,239.42