Finding the Fourth Proportional to 1,761.45, 2,429.16 and 1,200.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,761.45 : 2,429.16 = 1,200.80 : x
2. Step 2: Convert to fraction form
   1,761.45/2,429.16 = 1,200.80/x
3. Step 3: Cross multiply
   1,761.45x = 2,429.16 × 1,200.80
4. Step 4: Simplify right side
   1,761.45x = 2,916,940.20
5. Step 5: Solve for x
   x = 2,916,940.20/1,761.45
6. Step 6: Final answer
   x = 1,655.99