Finding the Fourth Proportional to 1,018.88, 1,525.31 and 760.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.88 : 1,525.31 = 760.02 : x
2. Step 2: Convert to fraction form
   1,018.88/1,525.31 = 760.02/x
3. Step 3: Cross multiply
   1,018.88x = 1,525.31 × 760.02
4. Step 4: Simplify right side
   1,018.88x = 1,159,258.48
5. Step 5: Solve for x
   x = 1,159,258.48/1,018.88
6. Step 6: Final answer
   x = 1,137.78