Finding the Fourth Proportional to 1,105.30, 1,525.31 and 607.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.30 : 1,525.31 = 607.97 : x
2. Step 2: Convert to fraction form
   1,105.30/1,525.31 = 607.97/x
3. Step 3: Cross multiply
   1,105.30x = 1,525.31 × 607.97
4. Step 4: Simplify right side
   1,105.30x = 927,342.72
5. Step 5: Solve for x
   x = 927,342.72/1,105.30
6. Step 6: Final answer
   x = 839.00