Finding the Third Proportional to 3,936,306,213 and 8,674,956,978

Step by Step Solution

1. Step 1: Write the proportion equation
   3,936,306,213 : 8,674,956,978 = 8,674,956,978 : x
2. Step 2: Convert to fraction form
   3,936,306,213/8,674,956,978 = 8,674,956,978/x
3. Step 3: Cross multiply
   3,936,306,213x = 8,674,956,978 × 8,674,956,978
4. Step 4: Simplify right side
   3,936,306,213x = 75,254,878,570,150,887,424
5. Step 5: Solve for x
   x = 75,254,878,570,150,887,424/3,936,306,213
6. Step 6: Final answer
   x = 19,118,146,429.16