Finding the Fourth Proportional to 1,672.32, 2,308.72 and 1,009.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.32 : 2,308.72 = 1,009.32 : x
2. Step 2: Convert to fraction form
   1,672.32/2,308.72 = 1,009.32/x
3. Step 3: Cross multiply
   1,672.32x = 2,308.72 × 1,009.32
4. Step 4: Simplify right side
   1,672.32x = 2,330,237.27
5. Step 5: Solve for x
   x = 2,330,237.27/1,672.32
6. Step 6: Final answer
   x = 1,393.42