Finding the Fourth Proportional to 1,317,258.72, 1,817,825.76 and 713,646.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317,258.72 : 1,817,825.76 = 713,646.72 : x
2. Step 2: Convert to fraction form
   1,317,258.72/1,817,825.76 = 713,646.72/x
3. Step 3: Cross multiply
   1,317,258.72x = 1,817,825.76 × 713,646.72
4. Step 4: Simplify right side
   1,317,258.72x = 1,297,285,391,155.51
5. Step 5: Solve for x
   x = 1,297,285,391,155.51/1,317,258.72
6. Step 6: Final answer
   x = 984,837.20