Finding the Fourth Proportional to 1,048.58, 1,561.72 and 1,019.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048.58 : 1,561.72 = 1,019.88 : x
2. Step 2: Convert to fraction form
   1,048.58/1,561.72 = 1,019.88/x
3. Step 3: Cross multiply
   1,048.58x = 1,561.72 × 1,019.88
4. Step 4: Simplify right side
   1,048.58x = 1,592,766.99
5. Step 5: Solve for x
   x = 1,592,766.99/1,048.58
6. Step 6: Final answer
   x = 1,518.98