Finding the Fourth Proportional to 1,570.22, 2,354.52 and 830.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.22 : 2,354.52 = 830.23 : x
2. Step 2: Convert to fraction form
   1,570.22/2,354.52 = 830.23/x
3. Step 3: Cross multiply
   1,570.22x = 2,354.52 × 830.23
4. Step 4: Simplify right side
   1,570.22x = 1,954,793.14
5. Step 5: Solve for x
   x = 1,954,793.14/1,570.22
6. Step 6: Final answer
   x = 1,244.92