Finding the Third Proportional to 3,908,178 and 8,611,464

Step by Step Solution

1. Step 1: Write the proportion equation
   3,908,178 : 8,611,464 = 8,611,464 : x
2. Step 2: Convert to fraction form
   3,908,178/8,611,464 = 8,611,464/x
3. Step 3: Cross multiply
   3,908,178x = 8,611,464 × 8,611,464
4. Step 4: Simplify right side
   3,908,178x = 74,157,312,223,296
5. Step 5: Solve for x
   x = 74,157,312,223,296/3,908,178
6. Step 6: Final answer
   x = 18,974,906.52