Finding the Fourth Proportional to 1,320,072.72, 1,821,701.52 and 716,460.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,072.72 : 1,821,701.52 = 716,460.72 : x
2. Step 2: Convert to fraction form
   1,320,072.72/1,821,701.52 = 716,460.72/x
3. Step 3: Cross multiply
   1,320,072.72x = 1,821,701.52 × 716,460.72
4. Step 4: Simplify right side
   1,320,072.72x = 1,305,177,582,644.29
5. Step 5: Solve for x
   x = 1,305,177,582,644.29/1,320,072.72
6. Step 6: Final answer
   x = 988,716.43