Finding the Fourth Proportional to 1,570.33, 2,167.32 and 907.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.33 : 2,167.32 = 907.06 : x
2. Step 2: Convert to fraction form
   1,570.33/2,167.32 = 907.06/x
3. Step 3: Cross multiply
   1,570.33x = 2,167.32 × 907.06
4. Step 4: Simplify right side
   1,570.33x = 1,965,889.28
5. Step 5: Solve for x
   x = 1,965,889.28/1,570.33
6. Step 6: Final answer
   x = 1,251.90