Finding the Fourth Proportional to 2,224.39, 3,336.30 and 991.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,224.39 : 3,336.30 = 991.52 : x
2. Step 2: Convert to fraction form
   2,224.39/3,336.30 = 991.52/x
3. Step 3: Cross multiply
   2,224.39x = 3,336.30 × 991.52
4. Step 4: Simplify right side
   2,224.39x = 3,308,003.22
5. Step 5: Solve for x
   x = 3,308,003.22/2,224.39
6. Step 6: Final answer
   x = 1,487.15