Finding the Fourth Proportional to 2,011.33, 3,009.43 and 1,189.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.33 : 3,009.43 = 1,189.99 : x
2. Step 2: Convert to fraction form
   2,011.33/3,009.43 = 1,189.99/x
3. Step 3: Cross multiply
   2,011.33x = 3,009.43 × 1,189.99
4. Step 4: Simplify right side
   2,011.33x = 3,581,191.61
5. Step 5: Solve for x
   x = 3,581,191.61/2,011.33
6. Step 6: Final answer
   x = 1,780.51