Finding the Fourth Proportional to 8,722.18, 12,036.56 and 4,945.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,722.18 : 12,036.56 = 4,945.34 : x
2. Step 2: Convert to fraction form
   8,722.18/12,036.56 = 4,945.34/x
3. Step 3: Cross multiply
   8,722.18x = 12,036.56 × 4,945.34
4. Step 4: Simplify right side
   8,722.18x = 59,524,881.63
5. Step 5: Solve for x
   x = 59,524,881.63/8,722.18
6. Step 6: Final answer
   x = 6,824.54