Finding the Third Proportional to 245,397 and 359,985

Step by Step Solution

1. Step 1: Write the proportion equation
   245,397 : 359,985 = 359,985 : x
2. Step 2: Convert to fraction form
   245,397/359,985 = 359,985/x
3. Step 3: Cross multiply
   245,397x = 359,985 × 359,985
4. Step 4: Simplify right side
   245,397x = 129,589,200,225
5. Step 5: Solve for x
   x = 129,589,200,225/245,397
6. Step 6: Final answer
   x = 528,079.81