Finding the Fourth Proportional to 1,180.34, 1,628.86 and 807.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,180.34 : 1,628.86 = 807.31 : x
2. Step 2: Convert to fraction form
   1,180.34/1,628.86 = 807.31/x
3. Step 3: Cross multiply
   1,180.34x = 1,628.86 × 807.31
4. Step 4: Simplify right side
   1,180.34x = 1,314,994.97
5. Step 5: Solve for x
   x = 1,314,994.97/1,180.34
6. Step 6: Final answer
   x = 1,114.08