Finding the Fourth Proportional to 1,180.50, 1,628.15 and 807.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.50 : 1,628.15 = 807.09 : x
2. Step 2: Convert to fraction form
   1,180.50/1,628.15 = 807.09/x
3. Step 3: Cross multiply
   1,180.50x = 1,628.15 × 807.09
4. Step 4: Simplify right side
   1,180.50x = 1,314,059.55
5. Step 5: Solve for x
   x = 1,314,059.55/1,180.50
6. Step 6: Final answer
   x = 1,113.14