Finding the Fourth Proportional to 1,105.31, 1,525.37 and 607.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.31 : 1,525.37 = 607.99 : x
2. Step 2: Convert to fraction form
   1,105.31/1,525.37 = 607.99/x
3. Step 3: Cross multiply
   1,105.31x = 1,525.37 × 607.99
4. Step 4: Simplify right side
   1,105.31x = 927,409.71
5. Step 5: Solve for x
   x = 927,409.71/1,105.31
6. Step 6: Final answer
   x = 839.05