Finding the Third Proportional to 721,356 and 1,567,128

Step by Step Solution

1. Step 1: Write the proportion equation
   721,356 : 1,567,128 = 1,567,128 : x
2. Step 2: Convert to fraction form
   721,356/1,567,128 = 1,567,128/x
3. Step 3: Cross multiply
   721,356x = 1,567,128 × 1,567,128
4. Step 4: Simplify right side
   721,356x = 2,455,890,168,384
5. Step 5: Solve for x
   x = 2,455,890,168,384/721,356
6. Step 6: Final answer
   x = 3,404,546.67