Finding the Third Proportional to 12,850,128 and 19,897,200

Step by Step Solution

1. Step 1: Write the proportion equation
   12,850,128 : 19,897,200 = 19,897,200 : x
2. Step 2: Convert to fraction form
   12,850,128/19,897,200 = 19,897,200/x
3. Step 3: Cross multiply
   12,850,128x = 19,897,200 × 19,897,200
4. Step 4: Simplify right side
   12,850,128x = 395,898,567,840,000
5. Step 5: Solve for x
   x = 395,898,567,840,000/12,850,128
6. Step 6: Final answer
   x = 30,808,920.18