Finding the Third Proportional to 1,210,356 and 1,758,780

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210,356 : 1,758,780 = 1,758,780 : x
2. Step 2: Convert to fraction form
   1,210,356/1,758,780 = 1,758,780/x
3. Step 3: Cross multiply
   1,210,356x = 1,758,780 × 1,758,780
4. Step 4: Simplify right side
   1,210,356x = 3,093,307,088,400
5. Step 5: Solve for x
   x = 3,093,307,088,400/1,210,356
6. Step 6: Final answer
   x = 2,555,700.21