Finding the Fourth Proportional to 1,253.34, 1,729.98 and 1,005.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,253.34 : 1,729.98 = 1,005.48 : x
2. Step 2: Convert to fraction form
   1,253.34/1,729.98 = 1,005.48/x
3. Step 3: Cross multiply
   1,253.34x = 1,729.98 × 1,005.48
4. Step 4: Simplify right side
   1,253.34x = 1,739,460.29
5. Step 5: Solve for x
   x = 1,739,460.29/1,253.34
6. Step 6: Final answer
   x = 1,387.86