Finding the Fourth Proportional to 1,417.90, 1,955.73 and 1,391.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.90 : 1,955.73 = 1,391.98 : x
2. Step 2: Convert to fraction form
   1,417.90/1,955.73 = 1,391.98/x
3. Step 3: Cross multiply
   1,417.90x = 1,955.73 × 1,391.98
4. Step 4: Simplify right side
   1,417.90x = 2,722,337.05
5. Step 5: Solve for x
   x = 2,722,337.05/1,417.90
6. Step 6: Final answer
   x = 1,919.98