Finding the Third Proportional to 252,087.50 and 390,525

Step by Step Solution

1. Step 1: Write the proportion equation
   252,087.50 : 390,525 = 390,525 : x
2. Step 2: Convert to fraction form
   252,087.50/390,525 = 390,525/x
3. Step 3: Cross multiply
   252,087.50x = 390,525 × 390,525
4. Step 4: Simplify right side
   252,087.50x = 152,509,775,625
5. Step 5: Solve for x
   x = 152,509,775,625/252,087.50
6. Step 6: Final answer
   x = 604,987.46