Finding the Fourth Proportional to 2,111.70, 3,168.45 and 1,332.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.70 : 3,168.45 = 1,332.30 : x
2. Step 2: Convert to fraction form
   2,111.70/3,168.45 = 1,332.30/x
3. Step 3: Cross multiply
   2,111.70x = 3,168.45 × 1,332.30
4. Step 4: Simplify right side
   2,111.70x = 4,221,325.94
5. Step 5: Solve for x
   x = 4,221,325.94/2,111.70
6. Step 6: Final answer
   x = 1,999.02