Finding the Fourth Proportional to 1,105.10, 1,525.04 and 607.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.10 : 1,525.04 = 607.77 : x
2. Step 2: Convert to fraction form
   1,105.10/1,525.04 = 607.77/x
3. Step 3: Cross multiply
   1,105.10x = 1,525.04 × 607.77
4. Step 4: Simplify right side
   1,105.10x = 926,872.80
5. Step 5: Solve for x
   x = 926,872.80/1,105.10
6. Step 6: Final answer
   x = 838.72