Finding the Fourth Proportional to 1,087.98, 1,501.01 and 715.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.98 : 1,501.01 = 715.16 : x
2. Step 2: Convert to fraction form
   1,087.98/1,501.01 = 715.16/x
3. Step 3: Cross multiply
   1,087.98x = 1,501.01 × 715.16
4. Step 4: Simplify right side
   1,087.98x = 1,073,460.75
5. Step 5: Solve for x
   x = 1,073,460.75/1,087.98
6. Step 6: Final answer
   x = 986.66