Finding the Fourth Proportional to 1,503.50, 2,075.40 and 1,131.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.50 : 2,075.40 = 1,131.56 : x
2. Step 2: Convert to fraction form
   1,503.50/2,075.40 = 1,131.56/x
3. Step 3: Cross multiply
   1,503.50x = 2,075.40 × 1,131.56
4. Step 4: Simplify right side
   1,503.50x = 2,348,423.59
5. Step 5: Solve for x
   x = 2,348,423.59/1,503.50
6. Step 6: Final answer
   x = 1,561.97