Finding the Fourth Proportional to 1,336.68, 1,848.18 and 1,315.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,336.68 : 1,848.18 = 1,315.80 : x
2. Step 2: Convert to fraction form
   1,336.68/1,848.18 = 1,315.80/x
3. Step 3: Cross multiply
   1,336.68x = 1,848.18 × 1,315.80
4. Step 4: Simplify right side
   1,336.68x = 2,431,835.24
5. Step 5: Solve for x
   x = 2,431,835.24/1,336.68
6. Step 6: Final answer
   x = 1,819.31