Finding the Fourth Proportional to 1,346.83, 1,858.10 and 993.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.83 : 1,858.10 = 993.60 : x
2. Step 2: Convert to fraction form
   1,346.83/1,858.10 = 993.60/x
3. Step 3: Cross multiply
   1,346.83x = 1,858.10 × 993.60
4. Step 4: Simplify right side
   1,346.83x = 1,846,208.16
5. Step 5: Solve for x
   x = 1,846,208.16/1,346.83
6. Step 6: Final answer
   x = 1,370.78