Finding the Fourth Proportional to 1,320,070.72, 1,821,698.76 and 716,458.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,320,070.72 : 1,821,698.76 = 716,458.72 : x
2. Step 2: Convert to fraction form
   1,320,070.72/1,821,698.76 = 716,458.72/x
3. Step 3: Cross multiply
   1,320,070.72x = 1,821,698.76 × 716,458.72
4. Step 4: Simplify right side
   1,320,070.72x = 1,305,171,961,815.19
5. Step 5: Solve for x
   x = 1,305,171,961,815.19/1,320,070.72
6. Step 6: Final answer
   x = 988,713.67