Finding the Fourth Proportional to 1,308.34, 1,971.51 and 1,082.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.34 : 1,971.51 = 1,082.31 : x
2. Step 2: Convert to fraction form
   1,308.34/1,971.51 = 1,082.31/x
3. Step 3: Cross multiply
   1,308.34x = 1,971.51 × 1,082.31
4. Step 4: Simplify right side
   1,308.34x = 2,133,779.58
5. Step 5: Solve for x
   x = 2,133,779.58/1,308.34
6. Step 6: Final answer
   x = 1,630.91