Finding the Third Proportional to 721,890 and 1,009,308

Step by Step Solution

1. Step 1: Write the proportion equation
   721,890 : 1,009,308 = 1,009,308 : x
2. Step 2: Convert to fraction form
   721,890/1,009,308 = 1,009,308/x
3. Step 3: Cross multiply
   721,890x = 1,009,308 × 1,009,308
4. Step 4: Simplify right side
   721,890x = 1,018,702,638,864
5. Step 5: Solve for x
   x = 1,018,702,638,864/721,890
6. Step 6: Final answer
   x = 1,411,160.48