Finding the Fourth Proportional to 7,111.16, 10,667.86 and 1,917.24

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.16 : 10,667.86 = 1,917.24 : x
2. Step 2: Convert to fraction form
   7,111.16/10,667.86 = 1,917.24/x
3. Step 3: Cross multiply
   7,111.16x = 10,667.86 × 1,917.24
4. Step 4: Simplify right side
   7,111.16x = 20,452,847.91
5. Step 5: Solve for x
   x = 20,452,847.91/7,111.16
6. Step 6: Final answer
   x = 2,876.16