Finding the Fourth Proportional to 1,364.40, 1,881.72 and 1,015.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,364.40 : 1,881.72 = 1,015.92 : x
2. Step 2: Convert to fraction form
   1,364.40/1,881.72 = 1,015.92/x
3. Step 3: Cross multiply
   1,364.40x = 1,881.72 × 1,015.92
4. Step 4: Simplify right side
   1,364.40x = 1,911,676.98
5. Step 5: Solve for x
   x = 1,911,676.98/1,364.40
6. Step 6: Final answer
   x = 1,401.11