Finding the Fourth Proportional to 2,185.31, 3,279.79 and 1,031.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.31 : 3,279.79 = 1,031.06 : x
2. Step 2: Convert to fraction form
   2,185.31/3,279.79 = 1,031.06/x
3. Step 3: Cross multiply
   2,185.31x = 3,279.79 × 1,031.06
4. Step 4: Simplify right side
   2,185.31x = 3,381,669.77
5. Step 5: Solve for x
   x = 3,381,669.77/2,185.31
6. Step 6: Final answer
   x = 1,547.45