Finding the Fourth Proportional to 1,672.43, 2,307.88 and 1,009.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.43 : 2,307.88 = 1,009.16 : x
2. Step 2: Convert to fraction form
   1,672.43/2,307.88 = 1,009.16/x
3. Step 3: Cross multiply
   1,672.43x = 2,307.88 × 1,009.16
4. Step 4: Simplify right side
   1,672.43x = 2,329,018.56
5. Step 5: Solve for x
   x = 2,329,018.56/1,672.43
6. Step 6: Final answer
   x = 1,392.60