Finding the Fourth Proportional to 1,392.46, 1,917.21 and 1,059.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.46 : 1,917.21 = 1,059.82 : x
2. Step 2: Convert to fraction form
   1,392.46/1,917.21 = 1,059.82/x
3. Step 3: Cross multiply
   1,392.46x = 1,917.21 × 1,059.82
4. Step 4: Simplify right side
   1,392.46x = 2,031,897.50
5. Step 5: Solve for x
   x = 2,031,897.50/1,392.46
6. Step 6: Final answer
   x = 1,459.21