Finding the Fourth Proportional to 1,212.06, 1,672.52 and 714.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,212.06 : 1,672.52 = 714.53 : x
2. Step 2: Convert to fraction form
   1,212.06/1,672.52 = 714.53/x
3. Step 3: Cross multiply
   1,212.06x = 1,672.52 × 714.53
4. Step 4: Simplify right side
   1,212.06x = 1,195,053.78
5. Step 5: Solve for x
   x = 1,195,053.78/1,212.06
6. Step 6: Final answer
   x = 985.97