Finding the Third Proportional to 2,129,905 and 4,685,627.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129,905 : 4,685,627.50 = 4,685,627.50 : x
2. Step 2: Convert to fraction form
   2,129,905/4,685,627.50 = 4,685,627.50/x
3. Step 3: Cross multiply
   2,129,905x = 4,685,627.50 × 4,685,627.50
4. Step 4: Simplify right side
   2,129,905x = 21,955,105,068,756.25
5. Step 5: Solve for x
   x = 21,955,105,068,756.25/2,129,905
6. Step 6: Final answer
   x = 10,308,020.81