Finding the Fourth Proportional to 2,120.93, 2,926.86 and 1,189.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.93 : 2,926.86 = 1,189.43 : x
2. Step 2: Convert to fraction form
   2,120.93/2,926.86 = 1,189.43/x
3. Step 3: Cross multiply
   2,120.93x = 2,926.86 × 1,189.43
4. Step 4: Simplify right side
   2,120.93x = 3,481,280.46
5. Step 5: Solve for x
   x = 3,481,280.46/2,120.93
6. Step 6: Final answer
   x = 1,641.40