Finding the Fourth Proportional to 1,116.54, 1,539.86 and 696.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.54 : 1,539.86 = 696.45 : x
2. Step 2: Convert to fraction form
   1,116.54/1,539.86 = 696.45/x
3. Step 3: Cross multiply
   1,116.54x = 1,539.86 × 696.45
4. Step 4: Simplify right side
   1,116.54x = 1,072,432.01
5. Step 5: Solve for x
   x = 1,072,432.01/1,116.54
6. Step 6: Final answer
   x = 960.50