Finding the Third Proportional to 8,513,886 and 12,758,373

Step by Step Solution

1. Step 1: Write the proportion equation
   8,513,886 : 12,758,373 = 12,758,373 : x
2. Step 2: Convert to fraction form
   8,513,886/12,758,373 = 12,758,373/x
3. Step 3: Cross multiply
   8,513,886x = 12,758,373 × 12,758,373
4. Step 4: Simplify right side
   8,513,886x = 162,776,081,607,129
5. Step 5: Solve for x
   x = 162,776,081,607,129/8,513,886
6. Step 6: Final answer
   x = 19,118,893.72