Finding the Fourth Proportional to 2,147.34, 3,221.21 and 848.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.34 : 3,221.21 = 848.50 : x
2. Step 2: Convert to fraction form
   2,147.34/3,221.21 = 848.50/x
3. Step 3: Cross multiply
   2,147.34x = 3,221.21 × 848.50
4. Step 4: Simplify right side
   2,147.34x = 2,733,196.69
5. Step 5: Solve for x
   x = 2,733,196.69/2,147.34
6. Step 6: Final answer
   x = 1,272.83