Finding the Fourth Proportional to 1,317,300.78, 1,817,874.69 and 713,688.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,317,300.78 : 1,817,874.69 = 713,688.78 : x
2. Step 2: Convert to fraction form
   1,317,300.78/1,817,874.69 = 713,688.78/x
3. Step 3: Cross multiply
   1,317,300.78x = 1,817,874.69 × 713,688.78
4. Step 4: Simplify right side
   1,317,300.78x = 1,297,396,769,698.98
5. Step 5: Solve for x
   x = 1,297,396,769,698.98/1,317,300.78
6. Step 6: Final answer
   x = 984,890.31