Finding the Third Proportional to 4,188,258 and 9,118,142

Step by Step Solution

1. Step 1: Write the proportion equation
   4,188,258 : 9,118,142 = 9,118,142 : x
2. Step 2: Convert to fraction form
   4,188,258/9,118,142 = 9,118,142/x
3. Step 3: Cross multiply
   4,188,258x = 9,118,142 × 9,118,142
4. Step 4: Simplify right side
   4,188,258x = 83,140,513,532,164
5. Step 5: Solve for x
   x = 83,140,513,532,164/4,188,258
6. Step 6: Final answer
   x = 19,850,857.69