Finding the Third Proportional to 139,155 and 297,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,155 : 297,985.50 = 297,985.50 : x
2. Step 2: Convert to fraction form
   139,155/297,985.50 = 297,985.50/x
3. Step 3: Cross multiply
   139,155x = 297,985.50 × 297,985.50
4. Step 4: Simplify right side
   139,155x = 88,795,358,210.25
5. Step 5: Solve for x
   x = 88,795,358,210.25/139,155
6. Step 6: Final answer
   x = 638,103.97