Finding the Fourth Proportional to 1,570.88, 2,353.82 and 830.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.88 : 2,353.82 = 830.48 : x
2. Step 2: Convert to fraction form
   1,570.88/2,353.82 = 830.48/x
3. Step 3: Cross multiply
   1,570.88x = 2,353.82 × 830.48
4. Step 4: Simplify right side
   1,570.88x = 1,954,784.51
5. Step 5: Solve for x
   x = 1,954,784.51/1,570.88
6. Step 6: Final answer
   x = 1,244.39