Finding the Fourth Proportional to 2,156.30, 3,232.80 and 985.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.30 : 3,232.80 = 985.49 : x
2. Step 2: Convert to fraction form
   2,156.30/3,232.80 = 985.49/x
3. Step 3: Cross multiply
   2,156.30x = 3,232.80 × 985.49
4. Step 4: Simplify right side
   2,156.30x = 3,185,875.91
5. Step 5: Solve for x
   x = 3,185,875.91/2,156.30
6. Step 6: Final answer
   x = 1,477.48