Finding the Third Proportional to 1,387,887 and 2,070,316

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387,887 : 2,070,316 = 2,070,316 : x
2. Step 2: Convert to fraction form
   1,387,887/2,070,316 = 2,070,316/x
3. Step 3: Cross multiply
   1,387,887x = 2,070,316 × 2,070,316
4. Step 4: Simplify right side
   1,387,887x = 4,286,208,339,856
5. Step 5: Solve for x
   x = 4,286,208,339,856/1,387,887
6. Step 6: Final answer
   x = 3,088,297.78