Finding the Fourth Proportional to 1,180.98, 1,630.53 and 715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.98 : 1,630.53 = 715.50 : x
2. Step 2: Convert to fraction form
   1,180.98/1,630.53 = 715.50/x
3. Step 3: Cross multiply
   1,180.98x = 1,630.53 × 715.50
4. Step 4: Simplify right side
   1,180.98x = 1,166,644.22
5. Step 5: Solve for x
   x = 1,166,644.22/1,180.98
6. Step 6: Final answer
   x = 987.86