Finding the Fourth Proportional to 2,109.98, 3,164.71 and 940

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.98 : 3,164.71 = 940 : x
2. Step 2: Convert to fraction form
   2,109.98/3,164.71 = 940/x
3. Step 3: Cross multiply
   2,109.98x = 3,164.71 × 940
4. Step 4: Simplify right side
   2,109.98x = 2,974,827.40
5. Step 5: Solve for x
   x = 2,974,827.40/2,109.98
6. Step 6: Final answer
   x = 1,409.88