Finding the Fourth Proportional to 12,316.50, 18,477.18 and 5,391

Step by Step Solution

1. Step 1: Write the proportion equation
   12,316.50 : 18,477.18 = 5,391 : x
2. Step 2: Convert to fraction form
   12,316.50/18,477.18 = 5,391/x
3. Step 3: Cross multiply
   12,316.50x = 18,477.18 × 5,391
4. Step 4: Simplify right side
   12,316.50x = 99,610,477.38
5. Step 5: Solve for x
   x = 99,610,477.38/12,316.50
6. Step 6: Final answer
   x = 8,087.56