Finding the Fourth Proportional to 1,580.31, 2,370.15 and 714.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,580.31 : 2,370.15 = 714.42 : x
2. Step 2: Convert to fraction form
   1,580.31/2,370.15 = 714.42/x
3. Step 3: Cross multiply
   1,580.31x = 2,370.15 × 714.42
4. Step 4: Simplify right side
   1,580.31x = 1,693,282.56
5. Step 5: Solve for x
   x = 1,693,282.56/1,580.31
6. Step 6: Final answer
   x = 1,071.49