Finding the Fourth Proportional to 1,139.46, 1,572.72 and 952.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.46 : 1,572.72 = 952.63 : x
2. Step 2: Convert to fraction form
   1,139.46/1,572.72 = 952.63/x
3. Step 3: Cross multiply
   1,139.46x = 1,572.72 × 952.63
4. Step 4: Simplify right side
   1,139.46x = 1,498,212.60
5. Step 5: Solve for x
   x = 1,498,212.60/1,139.46
6. Step 6: Final answer
   x = 1,314.84