Finding the Third Proportional to 245,391 and 368,086.50

Step by Step Solution

1. Step 1: Write the proportion equation
   245,391 : 368,086.50 = 368,086.50 : x
2. Step 2: Convert to fraction form
   245,391/368,086.50 = 368,086.50/x
3. Step 3: Cross multiply
   245,391x = 368,086.50 × 368,086.50
4. Step 4: Simplify right side
   245,391x = 135,487,671,482.25
5. Step 5: Solve for x
   x = 135,487,671,482.25/245,391
6. Step 6: Final answer
   x = 552,129.75