Finding the Third Proportional to 245,635.50 and 390,594

Step by Step Solution

1. Step 1: Write the proportion equation
   245,635.50 : 390,594 = 390,594 : x
2. Step 2: Convert to fraction form
   245,635.50/390,594 = 390,594/x
3. Step 3: Cross multiply
   245,635.50x = 390,594 × 390,594
4. Step 4: Simplify right side
   245,635.50x = 152,563,672,836
5. Step 5: Solve for x
   x = 152,563,672,836/245,635.50
6. Step 6: Final answer
   x = 621,097.82