Finding the Third Proportional to 257,992.50 and 390,882

Step by Step Solution

1. Step 1: Write the proportion equation
   257,992.50 : 390,882 = 390,882 : x
2. Step 2: Convert to fraction form
   257,992.50/390,882 = 390,882/x
3. Step 3: Cross multiply
   257,992.50x = 390,882 × 390,882
4. Step 4: Simplify right side
   257,992.50x = 152,788,737,924
5. Step 5: Solve for x
   x = 152,788,737,924/257,992.50
6. Step 6: Final answer
   x = 592,221.63