Finding the Fourth Proportional to 3,458.67, 5,188.76 and 993.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,458.67 : 5,188.76 = 993.30 : x
2. Step 2: Convert to fraction form
   3,458.67/5,188.76 = 993.30/x
3. Step 3: Cross multiply
   3,458.67x = 5,188.76 × 993.30
4. Step 4: Simplify right side
   3,458.67x = 5,153,995.31
5. Step 5: Solve for x
   x = 5,153,995.31/3,458.67
6. Step 6: Final answer
   x = 1,490.17