Finding the Fourth Proportional to 1,025.48, 1,536.60 and 699.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,025.48 : 1,536.60 = 699.86 : x
2. Step 2: Convert to fraction form
   1,025.48/1,536.60 = 699.86/x
3. Step 3: Cross multiply
   1,025.48x = 1,536.60 × 699.86
4. Step 4: Simplify right side
   1,025.48x = 1,075,404.88
5. Step 5: Solve for x
   x = 1,075,404.88/1,025.48
6. Step 6: Final answer
   x = 1,048.68