Finding the Fourth Proportional to 1,439.48, 1,985.46 and 1,417.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,439.48 : 1,985.46 = 1,417.88 : x
2. Step 2: Convert to fraction form
   1,439.48/1,985.46 = 1,417.88/x
3. Step 3: Cross multiply
   1,439.48x = 1,985.46 × 1,417.88
4. Step 4: Simplify right side
   1,439.48x = 2,815,144.02
5. Step 5: Solve for x
   x = 2,815,144.02/1,439.48
6. Step 6: Final answer
   x = 1,955.67