Finding the Fourth Proportional to 1,505.99, 2,075.45 and 1,085.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,505.99 : 2,075.45 = 1,085.61 : x
2. Step 2: Convert to fraction form
   1,505.99/2,075.45 = 1,085.61/x
3. Step 3: Cross multiply
   1,505.99x = 2,075.45 × 1,085.61
4. Step 4: Simplify right side
   1,505.99x = 2,253,123.85
5. Step 5: Solve for x
   x = 2,253,123.85/1,505.99
6. Step 6: Final answer
   x = 1,496.11