Finding the Fourth Proportional to 1,181.52, 1,629.98 and 715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,181.52 : 1,629.98 = 715.50 : x
2. Step 2: Convert to fraction form
   1,181.52/1,629.98 = 715.50/x
3. Step 3: Cross multiply
   1,181.52x = 1,629.98 × 715.50
4. Step 4: Simplify right side
   1,181.52x = 1,166,250.69
5. Step 5: Solve for x
   x = 1,166,250.69/1,181.52
6. Step 6: Final answer
   x = 987.08