Finding the Fourth Proportional to 1,272.83, 1,757.24 and 971.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,272.83 : 1,757.24 = 971.72 : x
2. Step 2: Convert to fraction form
   1,272.83/1,757.24 = 971.72/x
3. Step 3: Cross multiply
   1,272.83x = 1,757.24 × 971.72
4. Step 4: Simplify right side
   1,272.83x = 1,707,531.61
5. Step 5: Solve for x
   x = 1,707,531.61/1,272.83
6. Step 6: Final answer
   x = 1,341.53