Finding the Fourth Proportional to 1,890.18, 2,607.72 and 1,394.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,890.18 : 2,607.72 = 1,394.00 : x
2. Step 2: Convert to fraction form
   1,890.18/2,607.72 = 1,394.00/x
3. Step 3: Cross multiply
   1,890.18x = 2,607.72 × 1,394.00
4. Step 4: Simplify right side
   1,890.18x = 3,635,148.64
5. Step 5: Solve for x
   x = 3,635,148.64/1,890.18
6. Step 6: Final answer
   x = 1,923.18