Finding the Fourth Proportional to 2,147.34, 3,216.69 and 1,816.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.34 : 3,216.69 = 1,816.86 : x
2. Step 2: Convert to fraction form
   2,147.34/3,216.69 = 1,816.86/x
3. Step 3: Cross multiply
   2,147.34x = 3,216.69 × 1,816.86
4. Step 4: Simplify right side
   2,147.34x = 5,844,275.39
5. Step 5: Solve for x
   x = 5,844,275.39/2,147.34
6. Step 6: Final answer
   x = 2,721.63