Finding the Fourth Proportional to 2,478.80, 3,715.50 and 1,017.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478.80 : 3,715.50 = 1,017.56 : x
2. Step 2: Convert to fraction form
   2,478.80/3,715.50 = 1,017.56/x
3. Step 3: Cross multiply
   2,478.80x = 3,715.50 × 1,017.56
4. Step 4: Simplify right side
   2,478.80x = 3,780,744.18
5. Step 5: Solve for x
   x = 3,780,744.18/2,478.80
6. Step 6: Final answer
   x = 1,525.23