Finding the Fourth Proportional to 1,405.72, 2,103.72 and 971.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.72 : 2,103.72 = 971.02 : x
2. Step 2: Convert to fraction form
   1,405.72/2,103.72 = 971.02/x
3. Step 3: Cross multiply
   1,405.72x = 2,103.72 × 971.02
4. Step 4: Simplify right side
   1,405.72x = 2,042,754.19
5. Step 5: Solve for x
   x = 2,042,754.19/1,405.72
6. Step 6: Final answer
   x = 1,453.17