Finding the Fourth Proportional to 1,681.92, 2,320.86 and 1,009.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.92 : 2,320.86 = 1,009.59 : x
2. Step 2: Convert to fraction form
   1,681.92/2,320.86 = 1,009.59/x
3. Step 3: Cross multiply
   1,681.92x = 2,320.86 × 1,009.59
4. Step 4: Simplify right side
   1,681.92x = 2,343,100.40
5. Step 5: Solve for x
   x = 2,343,100.40/1,681.92
6. Step 6: Final answer
   x = 1,393.11