Finding the Fourth Proportional to 7,920.27, 10,931.43 and 5,091.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,920.27 : 10,931.43 = 5,091.18 : x
2. Step 2: Convert to fraction form
   7,920.27/10,931.43 = 5,091.18/x
3. Step 3: Cross multiply
   7,920.27x = 10,931.43 × 5,091.18
4. Step 4: Simplify right side
   7,920.27x = 55,653,877.79
5. Step 5: Solve for x
   x = 55,653,877.79/7,920.27
6. Step 6: Final answer
   x = 7,026.77