Finding the Fourth Proportional to 1,018.89, 1,526.04 and 786.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.89 : 1,526.04 = 786.15 : x
2. Step 2: Convert to fraction form
   1,018.89/1,526.04 = 786.15/x
3. Step 3: Cross multiply
   1,018.89x = 1,526.04 × 786.15
4. Step 4: Simplify right side
   1,018.89x = 1,199,696.35
5. Step 5: Solve for x
   x = 1,199,696.35/1,018.89
6. Step 6: Final answer
   x = 1,177.45