Finding the Fourth Proportional to 1,059.48, 1,588.41 and 818.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.48 : 1,588.41 = 818.10 : x
2. Step 2: Convert to fraction form
   1,059.48/1,588.41 = 818.10/x
3. Step 3: Cross multiply
   1,059.48x = 1,588.41 × 818.10
4. Step 4: Simplify right side
   1,059.48x = 1,299,478.22
5. Step 5: Solve for x
   x = 1,299,478.22/1,059.48
6. Step 6: Final answer
   x = 1,226.52