Finding the Fourth Proportional to 1,513.40, 2,088.71 and 850.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,513.40 : 2,088.71 = 850.31 : x
2. Step 2: Convert to fraction form
   1,513.40/2,088.71 = 850.31/x
3. Step 3: Cross multiply
   1,513.40x = 2,088.71 × 850.31
4. Step 4: Simplify right side
   1,513.40x = 1,776,051.00
5. Step 5: Solve for x
   x = 1,776,051.00/1,513.40
6. Step 6: Final answer
   x = 1,173.55