Finding the Fourth Proportional to 1,570.54, 2,357.51 and 913.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.54 : 2,357.51 = 913.15 : x
2. Step 2: Convert to fraction form
   1,570.54/2,357.51 = 913.15/x
3. Step 3: Cross multiply
   1,570.54x = 2,357.51 × 913.15
4. Step 4: Simplify right side
   1,570.54x = 2,152,760.26
5. Step 5: Solve for x
   x = 2,152,760.26/1,570.54
6. Step 6: Final answer
   x = 1,370.71