Finding the Third Proportional to 8,638,649,464.50 and 12,901,365,886.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,638,649,464.50 : 12,901,365,886.50 = 12,901,365,886.50 : x
2. Step 2: Convert to fraction form
   8,638,649,464.50/12,901,365,886.50 = 12,901,365,886.50/x
3. Step 3: Cross multiply
   8,638,649,464.50x = 12,901,365,886.50 × 12,901,365,886.50
4. Step 4: Simplify right side
   8,638,649,464.50x = 166,445,241,737,345,925,120
5. Step 5: Solve for x
   x = 166,445,241,737,345,925,120/8,638,649,464.50
6. Step 6: Final answer
   x = 19,267,507,313.65