Finding the Fourth Proportional to 1,392.69, 1,917.86 and 1,303.65

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.69 : 1,917.86 = 1,303.65 : x
2. Step 2: Convert to fraction form
   1,392.69/1,917.86 = 1,303.65/x
3. Step 3: Cross multiply
   1,392.69x = 1,917.86 × 1,303.65
4. Step 4: Simplify right side
   1,392.69x = 2,500,216.71
5. Step 5: Solve for x
   x = 2,500,216.71/1,392.69
6. Step 6: Final answer
   x = 1,795.25