Finding the Third Proportional to 6,666,642 and 9,439,440

Step by Step Solution

1. Step 1: Write the proportion equation
   6,666,642 : 9,439,440 = 9,439,440 : x
2. Step 2: Convert to fraction form
   6,666,642/9,439,440 = 9,439,440/x
3. Step 3: Cross multiply
   6,666,642x = 9,439,440 × 9,439,440
4. Step 4: Simplify right side
   6,666,642x = 89,103,027,513,600
5. Step 5: Solve for x
   x = 89,103,027,513,600/6,666,642
6. Step 6: Final answer
   x = 13,365,503.58