Finding the Third Proportional to 721,623 and 1,549,860

Step by Step Solution

1. Step 1: Write the proportion equation
   721,623 : 1,549,860 = 1,549,860 : x
2. Step 2: Convert to fraction form
   721,623/1,549,860 = 1,549,860/x
3. Step 3: Cross multiply
   721,623x = 1,549,860 × 1,549,860
4. Step 4: Simplify right side
   721,623x = 2,402,066,019,600
5. Step 5: Solve for x
   x = 2,402,066,019,600/721,623
6. Step 6: Final answer
   x = 3,328,699.36