Finding the Third Proportional to 39,456,386 and 86,455,492

Step by Step Solution

1. Step 1: Write the proportion equation
   39,456,386 : 86,455,492 = 86,455,492 : x
2. Step 2: Convert to fraction form
   39,456,386/86,455,492 = 86,455,492/x
3. Step 3: Cross multiply
   39,456,386x = 86,455,492 × 86,455,492
4. Step 4: Simplify right side
   39,456,386x = 7,474,552,096,962,064
5. Step 5: Solve for x
   x = 7,474,552,096,962,064/39,456,386
6. Step 6: Final answer
   x = 189,438,335.71