Finding the Fourth Proportional to 2,120.34, 2,926.04 and 1,236.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.34 : 2,926.04 = 1,236.72 : x
2. Step 2: Convert to fraction form
   2,120.34/2,926.04 = 1,236.72/x
3. Step 3: Cross multiply
   2,120.34x = 2,926.04 × 1,236.72
4. Step 4: Simplify right side
   2,120.34x = 3,618,692.19
5. Step 5: Solve for x
   x = 3,618,692.19/2,120.34
6. Step 6: Final answer
   x = 1,706.66