Finding the Third Proportional to 39,456,380 and 86,455,480

Step by Step Solution

1. Step 1: Write the proportion equation
   39,456,380 : 86,455,480 = 86,455,480 : x
2. Step 2: Convert to fraction form
   39,456,380/86,455,480 = 86,455,480/x
3. Step 3: Cross multiply
   39,456,380x = 86,455,480 × 86,455,480
4. Step 4: Simplify right side
   39,456,380x = 7,474,550,022,030,400
5. Step 5: Solve for x
   x = 7,474,550,022,030,400/39,456,380
6. Step 6: Final answer
   x = 189,438,311.93