Finding the Third Proportional to 1,688,312 and 3,689,968

Step by Step Solution

1. Step 1: Write the proportion equation
   1,688,312 : 3,689,968 = 3,689,968 : x
2. Step 2: Convert to fraction form
   1,688,312/3,689,968 = 3,689,968/x
3. Step 3: Cross multiply
   1,688,312x = 3,689,968 × 3,689,968
4. Step 4: Simplify right side
   1,688,312x = 13,615,863,841,024
5. Step 5: Solve for x
   x = 13,615,863,841,024/1,688,312
6. Step 6: Final answer
   x = 8,064,779.40