Finding the Fourth Proportional to 1,707.86, 2,558.43 and 1,275.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,707.86 : 2,558.43 = 1,275.38 : x
2. Step 2: Convert to fraction form
   1,707.86/2,558.43 = 1,275.38/x
3. Step 3: Cross multiply
   1,707.86x = 2,558.43 × 1,275.38
4. Step 4: Simplify right side
   1,707.86x = 3,262,970.45
5. Step 5: Solve for x
   x = 3,262,970.45/1,707.86
6. Step 6: Final answer
   x = 1,910.56