Finding the Fourth Proportional to 8,710.17, 12,021.98 and 5,355.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,710.17 : 12,021.98 = 5,355.89 : x
2. Step 2: Convert to fraction form
   8,710.17/12,021.98 = 5,355.89/x
3. Step 3: Cross multiply
   8,710.17x = 12,021.98 × 5,355.89
4. Step 4: Simplify right side
   8,710.17x = 64,388,402.46
5. Step 5: Solve for x
   x = 64,388,402.46/8,710.17
6. Step 6: Final answer
   x = 7,392.32