Finding the Fourth Proportional to 1,031.63, 1,422.82 and 907.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.63 : 1,422.82 = 907.03 : x
2. Step 2: Convert to fraction form
   1,031.63/1,422.82 = 907.03/x
3. Step 3: Cross multiply
   1,031.63x = 1,422.82 × 907.03
4. Step 4: Simplify right side
   1,031.63x = 1,290,540.42
5. Step 5: Solve for x
   x = 1,290,540.42/1,031.63
6. Step 6: Final answer
   x = 1,250.97