Finding the Fourth Proportional to 1,521.55, 2,099.75 and 892.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.55 : 2,099.75 = 892.10 : x
2. Step 2: Convert to fraction form
   1,521.55/2,099.75 = 892.10/x
3. Step 3: Cross multiply
   1,521.55x = 2,099.75 × 892.10
4. Step 4: Simplify right side
   1,521.55x = 1,873,178.71
5. Step 5: Solve for x
   x = 1,873,178.71/1,521.55
6. Step 6: Final answer
   x = 1,231.10