Finding the Fourth Proportional to 1,087.74, 1,500.18 and 715.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,087.74 : 1,500.18 = 715.08 : x
2. Step 2: Convert to fraction form
   1,087.74/1,500.18 = 715.08/x
3. Step 3: Cross multiply
   1,087.74x = 1,500.18 × 715.08
4. Step 4: Simplify right side
   1,087.74x = 1,072,748.71
5. Step 5: Solve for x
   x = 1,072,748.71/1,087.74
6. Step 6: Final answer
   x = 986.22