Finding the Fourth Proportional to 3,458.34, 5,187.38 and 993.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,458.34 : 5,187.38 = 993.15 : x
2. Step 2: Convert to fraction form
   3,458.34/5,187.38 = 993.15/x
3. Step 3: Cross multiply
   3,458.34x = 5,187.38 × 993.15
4. Step 4: Simplify right side
   3,458.34x = 5,151,841.48
5. Step 5: Solve for x
   x = 5,151,841.48/3,458.34
6. Step 6: Final answer
   x = 1,489.69