Finding the Fourth Proportional to 2,120.59, 2,926.34 and 1,189.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.59 : 2,926.34 = 1,189.03 : x
2. Step 2: Convert to fraction form
   2,120.59/2,926.34 = 1,189.03/x
3. Step 3: Cross multiply
   2,120.59x = 2,926.34 × 1,189.03
4. Step 4: Simplify right side
   2,120.59x = 3,479,500.11
5. Step 5: Solve for x
   x = 3,479,500.11/2,120.59
6. Step 6: Final answer
   x = 1,640.82