Finding the Third Proportional to 139,815,432 and 209,723,069.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,815,432 : 209,723,069.25 = 209,723,069.25 : x
2. Step 2: Convert to fraction form
   139,815,432/209,723,069.25 = 209,723,069.25/x
3. Step 3: Cross multiply
   139,815,432x = 209,723,069.25 × 209,723,069.25
4. Step 4: Simplify right side
   139,815,432x = 43,983,765,775,640,296
5. Step 5: Solve for x
   x = 43,983,765,775,640,296/139,815,432
6. Step 6: Final answer
   x = 314,584,485.75