Finding the Fourth Proportional to 1,018.50, 1,406.86 and 753.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.50 : 1,406.86 = 753.48 : x
2. Step 2: Convert to fraction form
   1,018.50/1,406.86 = 753.48/x
3. Step 3: Cross multiply
   1,018.50x = 1,406.86 × 753.48
4. Step 4: Simplify right side
   1,018.50x = 1,060,040.87
5. Step 5: Solve for x
   x = 1,060,040.87/1,018.50
6. Step 6: Final answer
   x = 1,040.79