Finding the Fourth Proportional to 1,513.78, 2,088.92 and 850.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.78 : 2,088.92 = 850.59 : x
2. Step 2: Convert to fraction form
   1,513.78/2,088.92 = 850.59/x
3. Step 3: Cross multiply
   1,513.78x = 2,088.92 × 850.59
4. Step 4: Simplify right side
   1,513.78x = 1,776,816.59
5. Step 5: Solve for x
   x = 1,776,816.59/1,513.78
6. Step 6: Final answer
   x = 1,173.76