Finding the Third Proportional to 251,928 and 390,061.13

Step by Step Solution

1. Step 1: Write the proportion equation
   251,928 : 390,061.13 = 390,061.13 : x
2. Step 2: Convert to fraction form
   251,928/390,061.13 = 390,061.13/x
3. Step 3: Cross multiply
   251,928x = 390,061.13 × 390,061.13
4. Step 4: Simplify right side
   251,928x = 152,147,681,236.27
5. Step 5: Solve for x
   x = 152,147,681,236.27/251,928
6. Step 6: Final answer
   x = 603,933.19