Finding the Fourth Proportional to 1,293.70, 1,941.69 and 853.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,293.70 : 1,941.69 = 853.72 : x
2. Step 2: Convert to fraction form
   1,293.70/1,941.69 = 853.72/x
3. Step 3: Cross multiply
   1,293.70x = 1,941.69 × 853.72
4. Step 4: Simplify right side
   1,293.70x = 1,657,659.59
5. Step 5: Solve for x
   x = 1,657,659.59/1,293.70
6. Step 6: Final answer
   x = 1,281.33