Finding the Fourth Proportional to 1,457.78, 2,185.58 and 880.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,457.78 : 2,185.58 = 880.52 : x
2. Step 2: Convert to fraction form
   1,457.78/2,185.58 = 880.52/x
3. Step 3: Cross multiply
   1,457.78x = 2,185.58 × 880.52
4. Step 4: Simplify right side
   1,457.78x = 1,924,446.90
5. Step 5: Solve for x
   x = 1,924,446.90/1,457.78
6. Step 6: Final answer
   x = 1,320.12