Finding the Fourth Proportional to 1,811.76, 2,499.90 and 1,065.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.76 : 2,499.90 = 1,065.86 : x
2. Step 2: Convert to fraction form
   1,811.76/2,499.90 = 1,065.86/x
3. Step 3: Cross multiply
   1,811.76x = 2,499.90 × 1,065.86
4. Step 4: Simplify right side
   1,811.76x = 2,664,530.91
5. Step 5: Solve for x
   x = 2,664,530.91/1,811.76
6. Step 6: Final answer
   x = 1,470.69