Finding the Fourth Proportional to 1,312.34, 1,809.34 and 1,075.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,312.34 : 1,809.34 = 1,075.42 : x
2. Step 2: Convert to fraction form
   1,312.34/1,809.34 = 1,075.42/x
3. Step 3: Cross multiply
   1,312.34x = 1,809.34 × 1,075.42
4. Step 4: Simplify right side
   1,312.34x = 1,945,800.42
5. Step 5: Solve for x
   x = 1,945,800.42/1,312.34
6. Step 6: Final answer
   x = 1,482.70