Finding the Fourth Proportional to 3,457.46, 5,185.12 and 991.62

Step by Step Solution

1. Step 1: Write the proportion equation
   3,457.46 : 5,185.12 = 991.62 : x
2. Step 2: Convert to fraction form
   3,457.46/5,185.12 = 991.62/x
3. Step 3: Cross multiply
   3,457.46x = 5,185.12 × 991.62
4. Step 4: Simplify right side
   3,457.46x = 5,141,668.69
5. Step 5: Solve for x
   x = 5,141,668.69/3,457.46
6. Step 6: Final answer
   x = 1,487.12