Finding the Fourth Proportional to 1,315.55, 1,814.55 and 1,066.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.55 : 1,814.55 = 1,066.88 : x
2. Step 2: Convert to fraction form
   1,315.55/1,814.55 = 1,066.88/x
3. Step 3: Cross multiply
   1,315.55x = 1,814.55 × 1,066.88
4. Step 4: Simplify right side
   1,315.55x = 1,935,907.10
5. Step 5: Solve for x
   x = 1,935,907.10/1,315.55
6. Step 6: Final answer
   x = 1,471.56