Finding the Third Proportional to 3,910,303 and 8,178,123

Step by Step Solution

1. Step 1: Write the proportion equation
   3,910,303 : 8,178,123 = 8,178,123 : x
2. Step 2: Convert to fraction form
   3,910,303/8,178,123 = 8,178,123/x
3. Step 3: Cross multiply
   3,910,303x = 8,178,123 × 8,178,123
4. Step 4: Simplify right side
   3,910,303x = 66,881,695,803,129
5. Step 5: Solve for x
   x = 66,881,695,803,129/3,910,303
6. Step 6: Final answer
   x = 17,103,967.60