Finding the Third Proportional to 18,513.56 and 39,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,513.56 : 39,487.50 = 39,487.50 : x
2. Step 2: Convert to fraction form
   18,513.56/39,487.50 = 39,487.50/x
3. Step 3: Cross multiply
   18,513.56x = 39,487.50 × 39,487.50
4. Step 4: Simplify right side
   18,513.56x = 1,559,262,656.25
5. Step 5: Solve for x
   x = 1,559,262,656.25/18,513.56
6. Step 6: Final answer
   x = 84,222.72