Finding the Third Proportional to 4,978,659 and 10,921,158

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,659 : 10,921,158 = 10,921,158 : x
2. Step 2: Convert to fraction form
   4,978,659/10,921,158 = 10,921,158/x
3. Step 3: Cross multiply
   4,978,659x = 10,921,158 × 10,921,158
4. Step 4: Simplify right side
   4,978,659x = 119,271,692,060,964
5. Step 5: Solve for x
   x = 119,271,692,060,964/4,978,659
6. Step 6: Final answer
   x = 23,956,589.93