Finding the Fourth Proportional to 1,164.48, 1,607.18 and 698.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.48 : 1,607.18 = 698.80 : x
2. Step 2: Convert to fraction form
   1,164.48/1,607.18 = 698.80/x
3. Step 3: Cross multiply
   1,164.48x = 1,607.18 × 698.80
4. Step 4: Simplify right side
   1,164.48x = 1,123,097.38
5. Step 5: Solve for x
   x = 1,123,097.38/1,164.48
6. Step 6: Final answer
   x = 964.46