Finding the Fourth Proportional to 1,015.58, 1,513.72 and 1,013.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.58 : 1,513.72 = 1,013.96 : x
2. Step 2: Convert to fraction form
   1,015.58/1,513.72 = 1,013.96/x
3. Step 3: Cross multiply
   1,015.58x = 1,513.72 × 1,013.96
4. Step 4: Simplify right side
   1,015.58x = 1,534,851.53
5. Step 5: Solve for x
   x = 1,534,851.53/1,015.58
6. Step 6: Final answer
   x = 1,511.31