Finding the Third Proportional to 12,618,139.50 and 18,905,906.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,618,139.50 : 18,905,906.25 = 18,905,906.25 : x
2. Step 2: Convert to fraction form
   12,618,139.50/18,905,906.25 = 18,905,906.25/x
3. Step 3: Cross multiply
   12,618,139.50x = 18,905,906.25 × 18,905,906.25
4. Step 4: Simplify right side
   12,618,139.50x = 357,433,291,133,789.06
5. Step 5: Solve for x
   x = 357,433,291,133,789.06/12,618,139.50
6. Step 6: Final answer
   x = 28,326,940.84