Finding the Third Proportional to 1,338,307.31 and 1,907,815.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338,307.31 : 1,907,815.78 = 1,907,815.78 : x
2. Step 2: Convert to fraction form
   1,338,307.31/1,907,815.78 = 1,907,815.78/x
3. Step 3: Cross multiply
   1,338,307.31x = 1,907,815.78 × 1,907,815.78
4. Step 4: Simplify right side
   1,338,307.31x = 3,639,761,055,186.55
5. Step 5: Solve for x
   x = 3,639,761,055,186.55/1,338,307.31
6. Step 6: Final answer
   x = 2,719,675.09