Finding the Fourth Proportional to 1,394.71, 1,927.15 and 1,098.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.71 : 1,927.15 = 1,098.31 : x
2. Step 2: Convert to fraction form
   1,394.71/1,927.15 = 1,098.31/x
3. Step 3: Cross multiply
   1,394.71x = 1,927.15 × 1,098.31
4. Step 4: Simplify right side
   1,394.71x = 2,116,615.39
5. Step 5: Solve for x
   x = 2,116,615.39/1,394.71
6. Step 6: Final answer
   x = 1,517.60