Finding the Third Proportional to 1,680,126 and 3,686,840

Step by Step Solution

1. Step 1: Write the proportion equation
   1,680,126 : 3,686,840 = 3,686,840 : x
2. Step 2: Convert to fraction form
   1,680,126/3,686,840 = 3,686,840/x
3. Step 3: Cross multiply
   1,680,126x = 3,686,840 × 3,686,840
4. Step 4: Simplify right side
   1,680,126x = 13,592,789,185,600
5. Step 5: Solve for x
   x = 13,592,789,185,600/1,680,126
6. Step 6: Final answer
   x = 8,090,339.17