Finding the Fourth Proportional to 1,081.34, 1,621.80 and 884.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.34 : 1,621.80 = 884.51 : x
2. Step 2: Convert to fraction form
   1,081.34/1,621.80 = 884.51/x
3. Step 3: Cross multiply
   1,081.34x = 1,621.80 × 884.51
4. Step 4: Simplify right side
   1,081.34x = 1,434,498.32
5. Step 5: Solve for x
   x = 1,434,498.32/1,081.34
6. Step 6: Final answer
   x = 1,326.59