Finding the Fourth Proportional to 1,672.87, 2,308.84 and 964.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.87 : 2,308.84 = 964.58 : x
2. Step 2: Convert to fraction form
   1,672.87/2,308.84 = 964.58/x
3. Step 3: Cross multiply
   1,672.87x = 2,308.84 × 964.58
4. Step 4: Simplify right side
   1,672.87x = 2,227,060.89
5. Step 5: Solve for x
   x = 2,227,060.89/1,672.87
6. Step 6: Final answer
   x = 1,331.28