Finding the Fourth Proportional to 2,111.86, 3,164.70 and 1,330

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.86 : 3,164.70 = 1,330 : x
2. Step 2: Convert to fraction form
   2,111.86/3,164.70 = 1,330/x
3. Step 3: Cross multiply
   2,111.86x = 3,164.70 × 1,330
4. Step 4: Simplify right side
   2,111.86x = 4,209,051
5. Step 5: Solve for x
   x = 4,209,051/2,111.86
6. Step 6: Final answer
   x = 1,993.05