Finding the Fourth Proportional to 1,770.72, 2,643.12 and 1,642.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,770.72 : 2,643.12 = 1,642.22 : x
2. Step 2: Convert to fraction form
   1,770.72/2,643.12 = 1,642.22/x
3. Step 3: Cross multiply
   1,770.72x = 2,643.12 × 1,642.22
4. Step 4: Simplify right side
   1,770.72x = 4,340,584.53
5. Step 5: Solve for x
   x = 4,340,584.53/1,770.72
6. Step 6: Final answer
   x = 2,451.31