Finding the Fourth Proportional to 1,856.16, 2,561.31 and 1,109.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,856.16 : 2,561.31 = 1,109.94 : x
2. Step 2: Convert to fraction form
   1,856.16/2,561.31 = 1,109.94/x
3. Step 3: Cross multiply
   1,856.16x = 2,561.31 × 1,109.94
4. Step 4: Simplify right side
   1,856.16x = 2,842,900.42
5. Step 5: Solve for x
   x = 2,842,900.42/1,856.16
6. Step 6: Final answer
   x = 1,531.60