Finding the Third Proportional to 19,561.50 and 36,915.75

Step by Step Solution

1. Step 1: Write the proportion equation
   19,561.50 : 36,915.75 = 36,915.75 : x
2. Step 2: Convert to fraction form
   19,561.50/36,915.75 = 36,915.75/x
3. Step 3: Cross multiply
   19,561.50x = 36,915.75 × 36,915.75
4. Step 4: Simplify right side
   19,561.50x = 1,362,772,598.06
5. Step 5: Solve for x
   x = 1,362,772,598.06/19,561.50
6. Step 6: Final answer
   x = 69,666.06