Finding the Fourth Proportional to 1,457.60, 2,010.55 and 890.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,457.60 : 2,010.55 = 890.16 : x
2. Step 2: Convert to fraction form
   1,457.60/2,010.55 = 890.16/x
3. Step 3: Cross multiply
   1,457.60x = 2,010.55 × 890.16
4. Step 4: Simplify right side
   1,457.60x = 1,789,717.55
5. Step 5: Solve for x
   x = 1,789,717.55/1,457.60
6. Step 6: Final answer
   x = 1,227.86