Finding the Fourth Proportional to 1,229.31, 1,700.93 and 1,072.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,229.31 : 1,700.93 = 1,072.31 : x
2. Step 2: Convert to fraction form
   1,229.31/1,700.93 = 1,072.31/x
3. Step 3: Cross multiply
   1,229.31x = 1,700.93 × 1,072.31
4. Step 4: Simplify right side
   1,229.31x = 1,823,918.42
5. Step 5: Solve for x
   x = 1,823,918.42/1,229.31
6. Step 6: Final answer
   x = 1,483.69