Finding the Fourth Proportional to 1,070.12, 1,603.83 and 514.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.12 : 1,603.83 = 514.37 : x
2. Step 2: Convert to fraction form
   1,070.12/1,603.83 = 514.37/x
3. Step 3: Cross multiply
   1,070.12x = 1,603.83 × 514.37
4. Step 4: Simplify right side
   1,070.12x = 824,962.04
5. Step 5: Solve for x
   x = 824,962.04/1,070.12
6. Step 6: Final answer
   x = 770.91