Finding the Fourth Proportional to 1,315.90, 1,817.82 and 1,052.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.90 : 1,817.82 = 1,052.10 : x
2. Step 2: Convert to fraction form
   1,315.90/1,817.82 = 1,052.10/x
3. Step 3: Cross multiply
   1,315.90x = 1,817.82 × 1,052.10
4. Step 4: Simplify right side
   1,315.90x = 1,912,520.35
5. Step 5: Solve for x
   x = 1,912,520.35/1,315.90
6. Step 6: Final answer
   x = 1,453.39