Finding the Fourth Proportional to 11,321.92, 16,980.96 and 3,112

Step by Step Solution

1. Step 1: Write the proportion equation
   11,321.92 : 16,980.96 = 3,112 : x
2. Step 2: Convert to fraction form
   11,321.92/16,980.96 = 3,112/x
3. Step 3: Cross multiply
   11,321.92x = 16,980.96 × 3,112
4. Step 4: Simplify right side
   11,321.92x = 52,844,747.52
5. Step 5: Solve for x
   x = 52,844,747.52/11,321.92
6. Step 6: Final answer
   x = 4,667.47