Finding the Fourth Proportional to 1,892.39, 2,610.86 and 1,145.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.39 : 2,610.86 = 1,145.05 : x
2. Step 2: Convert to fraction form
   1,892.39/2,610.86 = 1,145.05/x
3. Step 3: Cross multiply
   1,892.39x = 2,610.86 × 1,145.05
4. Step 4: Simplify right side
   1,892.39x = 2,989,552.99
5. Step 5: Solve for x
   x = 2,989,552.99/1,892.39
6. Step 6: Final answer
   x = 1,579.78