Finding the Fourth Proportional to 1,570.74, 2,167.59 and 907.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.74 : 2,167.59 = 907.74 : x
2. Step 2: Convert to fraction form
   1,570.74/2,167.59 = 907.74/x
3. Step 3: Cross multiply
   1,570.74x = 2,167.59 × 907.74
4. Step 4: Simplify right side
   1,570.74x = 1,967,608.15
5. Step 5: Solve for x
   x = 1,967,608.15/1,570.74
6. Step 6: Final answer
   x = 1,252.66