Finding the Fourth Proportional to 1,320,066.72, 1,821,693.24 and 716,454.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,066.72 : 1,821,693.24 = 716,454.72 : x
2. Step 2: Convert to fraction form
   1,320,066.72/1,821,693.24 = 716,454.72/x
3. Step 3: Cross multiply
   1,320,066.72x = 1,821,693.24 × 716,454.72
4. Step 4: Simplify right side
   1,320,066.72x = 1,305,160,720,190.09
5. Step 5: Solve for x
   x = 1,305,160,720,190.09/1,320,066.72
6. Step 6: Final answer
   x = 988,708.15