Finding the Third Proportional to 290,587.50 and 390,501

Step by Step Solution

1. Step 1: Write the proportion equation
   290,587.50 : 390,501 = 390,501 : x
2. Step 2: Convert to fraction form
   290,587.50/390,501 = 390,501/x
3. Step 3: Cross multiply
   290,587.50x = 390,501 × 390,501
4. Step 4: Simplify right side
   290,587.50x = 152,491,031,001
5. Step 5: Solve for x
   x = 152,491,031,001/290,587.50
6. Step 6: Final answer
   x = 524,768.03