Finding the Fourth Proportional to 2,156.76, 3,236.02 and 987.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.76 : 3,236.02 = 987.32 : x
2. Step 2: Convert to fraction form
   2,156.76/3,236.02 = 987.32/x
3. Step 3: Cross multiply
   2,156.76x = 3,236.02 × 987.32
4. Step 4: Simplify right side
   2,156.76x = 3,194,992.89
5. Step 5: Solve for x
   x = 3,194,992.89/2,156.76
6. Step 6: Final answer
   x = 1,481.39