Finding the Fourth Proportional to 9,018.92, 12,446.78 and 5,191.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,018.92 : 12,446.78 = 5,191.72 : x
2. Step 2: Convert to fraction form
   9,018.92/12,446.78 = 5,191.72/x
3. Step 3: Cross multiply
   9,018.92x = 12,446.78 × 5,191.72
4. Step 4: Simplify right side
   9,018.92x = 64,620,196.66
5. Step 5: Solve for x
   x = 64,620,196.66/9,018.92
6. Step 6: Final answer
   x = 7,164.96