Finding the Fourth Proportional to 1,325.61, 1,986.94 and 1,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,325.61 : 1,986.94 = 1,018.72 : x
2. Step 2: Convert to fraction form
   1,325.61/1,986.94 = 1,018.72/x
3. Step 3: Cross multiply
   1,325.61x = 1,986.94 × 1,018.72
4. Step 4: Simplify right side
   1,325.61x = 2,024,131.82
5. Step 5: Solve for x
   x = 2,024,131.82/1,325.61
6. Step 6: Final answer
   x = 1,526.95