Finding the Fourth Proportional to 2,181.81, 3,272.69 and 538.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,181.81 : 3,272.69 = 538.34 : x
2. Step 2: Convert to fraction form
   2,181.81/3,272.69 = 538.34/x
3. Step 3: Cross multiply
   2,181.81x = 3,272.69 × 538.34
4. Step 4: Simplify right side
   2,181.81x = 1,761,819.93
5. Step 5: Solve for x
   x = 1,761,819.93/2,181.81
6. Step 6: Final answer
   x = 807.50