Finding the Fourth Proportional to 1,339.52, 1,851.96 and 1,009.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.52 : 1,851.96 = 1,009.64 : x
2. Step 2: Convert to fraction form
   1,339.52/1,851.96 = 1,009.64/x
3. Step 3: Cross multiply
   1,339.52x = 1,851.96 × 1,009.64
4. Step 4: Simplify right side
   1,339.52x = 1,869,812.89
5. Step 5: Solve for x
   x = 1,869,812.89/1,339.52
6. Step 6: Final answer
   x = 1,395.88