Finding the Fourth Proportional to 1,570.58, 2,167.29 and 907.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,570.58 : 2,167.29 = 907.31 : x
2. Step 2: Convert to fraction form
   1,570.58/2,167.29 = 907.31/x
3. Step 3: Cross multiply
   1,570.58x = 2,167.29 × 907.31
4. Step 4: Simplify right side
   1,570.58x = 1,966,403.89
5. Step 5: Solve for x
   x = 1,966,403.89/1,570.58
6. Step 6: Final answer
   x = 1,252.02