Finding the Fourth Proportional to 1,061.72, 1,464.83 and 688.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.72 : 1,464.83 = 688.99 : x
2. Step 2: Convert to fraction form
   1,061.72/1,464.83 = 688.99/x
3. Step 3: Cross multiply
   1,061.72x = 1,464.83 × 688.99
4. Step 4: Simplify right side
   1,061.72x = 1,009,253.22
5. Step 5: Solve for x
   x = 1,009,253.22/1,061.72
6. Step 6: Final answer
   x = 950.58