Finding the Third Proportional to 257,968.50 and 390,848

Step by Step Solution

1. Step 1: Write the proportion equation
   257,968.50 : 390,848 = 390,848 : x
2. Step 2: Convert to fraction form
   257,968.50/390,848 = 390,848/x
3. Step 3: Cross multiply
   257,968.50x = 390,848 × 390,848
4. Step 4: Simplify right side
   257,968.50x = 152,762,159,104
5. Step 5: Solve for x
   x = 152,762,159,104/257,968.50
6. Step 6: Final answer
   x = 592,173.69