Finding the Fourth Proportional to 1,935.84, 2,669.69 and 1,439.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,935.84 : 2,669.69 = 1,439.72 : x
2. Step 2: Convert to fraction form
   1,935.84/2,669.69 = 1,439.72/x
3. Step 3: Cross multiply
   1,935.84x = 2,669.69 × 1,439.72
4. Step 4: Simplify right side
   1,935.84x = 3,843,606.09
5. Step 5: Solve for x
   x = 3,843,606.09/1,935.84
6. Step 6: Final answer
   x = 1,985.50