Finding the Fourth Proportional to 1,936.64, 2,905.72 and 1,243.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,936.64 : 2,905.72 = 1,243.06 : x
2. Step 2: Convert to fraction form
   1,936.64/2,905.72 = 1,243.06/x
3. Step 3: Cross multiply
   1,936.64x = 2,905.72 × 1,243.06
4. Step 4: Simplify right side
   1,936.64x = 3,611,984.30
5. Step 5: Solve for x
   x = 3,611,984.30/1,936.64
6. Step 6: Final answer
   x = 1,865.08