Finding the Fourth Proportional to 12,487.71, 18,735.72 and 8,316.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,487.71 : 18,735.72 = 8,316.01 : x
2. Step 2: Convert to fraction form
   12,487.71/18,735.72 = 8,316.01/x
3. Step 3: Cross multiply
   12,487.71x = 18,735.72 × 8,316.01
4. Step 4: Simplify right side
   12,487.71x = 155,806,388.04
5. Step 5: Solve for x
   x = 155,806,388.04/12,487.71
6. Step 6: Final answer
   x = 12,476.78