Finding the Fourth Proportional to 2,112.48, 2,911.76 and 1,692.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.48 : 2,911.76 = 1,692.09 : x
2. Step 2: Convert to fraction form
   2,112.48/2,911.76 = 1,692.09/x
3. Step 3: Cross multiply
   2,112.48x = 2,911.76 × 1,692.09
4. Step 4: Simplify right side
   2,112.48x = 4,926,951.52
5. Step 5: Solve for x
   x = 4,926,951.52/2,112.48
6. Step 6: Final answer
   x = 2,332.31