Finding the Fourth Proportional to 1,731.31, 2,388.89 and 985.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,731.31 : 2,388.89 = 985.22 : x
2. Step 2: Convert to fraction form
   1,731.31/2,388.89 = 985.22/x
3. Step 3: Cross multiply
   1,731.31x = 2,388.89 × 985.22
4. Step 4: Simplify right side
   1,731.31x = 2,353,577.28
5. Step 5: Solve for x
   x = 2,353,577.28/1,731.31
6. Step 6: Final answer
   x = 1,359.42