Finding the Third Proportional to 155,040.50 and 210,412

Step by Step Solution

1. Step 1: Write the proportion equation
   155,040.50 : 210,412 = 210,412 : x
2. Step 2: Convert to fraction form
   155,040.50/210,412 = 210,412/x
3. Step 3: Cross multiply
   155,040.50x = 210,412 × 210,412
4. Step 4: Simplify right side
   155,040.50x = 44,273,209,744
5. Step 5: Solve for x
   x = 44,273,209,744/155,040.50
6. Step 6: Final answer
   x = 285,559.00