Finding the Fourth Proportional to 1,811.50, 2,499.87 and 1,065.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,811.50 : 2,499.87 = 1,065.45 : x
2. Step 2: Convert to fraction form
   1,811.50/2,499.87 = 1,065.45/x
3. Step 3: Cross multiply
   1,811.50x = 2,499.87 × 1,065.45
4. Step 4: Simplify right side
   1,811.50x = 2,663,486.49
5. Step 5: Solve for x
   x = 2,663,486.49/1,811.50
6. Step 6: Final answer
   x = 1,470.32