Finding the Fourth Proportional to 1,339.05, 1,848.51 and 1,007.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.05 : 1,848.51 = 1,007.60 : x
2. Step 2: Convert to fraction form
   1,339.05/1,848.51 = 1,007.60/x
3. Step 3: Cross multiply
   1,339.05x = 1,848.51 × 1,007.60
4. Step 4: Simplify right side
   1,339.05x = 1,862,558.68
5. Step 5: Solve for x
   x = 1,862,558.68/1,339.05
6. Step 6: Final answer
   x = 1,390.96