Finding the Fourth Proportional to 3,145.58, 4,719.12 and 1,065.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,145.58 : 4,719.12 = 1,065.50 : x
2. Step 2: Convert to fraction form
   3,145.58/4,719.12 = 1,065.50/x
3. Step 3: Cross multiply
   3,145.58x = 4,719.12 × 1,065.50
4. Step 4: Simplify right side
   3,145.58x = 5,028,222.36
5. Step 5: Solve for x
   x = 5,028,222.36/3,145.58
6. Step 6: Final answer
   x = 1,598.50