Finding the Fourth Proportional to 1,925.65, 2,657.10 and 1,086.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.65 : 2,657.10 = 1,086.31 : x
2. Step 2: Convert to fraction form
   1,925.65/2,657.10 = 1,086.31/x
3. Step 3: Cross multiply
   1,925.65x = 2,657.10 × 1,086.31
4. Step 4: Simplify right side
   1,925.65x = 2,886,434.30
5. Step 5: Solve for x
   x = 2,886,434.30/1,925.65
6. Step 6: Final answer
   x = 1,498.94