Finding the Fourth Proportional to 2,109.63, 3,164.50 and 722.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.63 : 3,164.50 = 722.96 : x
2. Step 2: Convert to fraction form
   2,109.63/3,164.50 = 722.96/x
3. Step 3: Cross multiply
   2,109.63x = 3,164.50 × 722.96
4. Step 4: Simplify right side
   2,109.63x = 2,287,787.48
5. Step 5: Solve for x
   x = 2,287,787.48/2,109.63
6. Step 6: Final answer
   x = 1,084.45