Finding the Fourth Proportional to 1,764.45, 2,431.82 and 1,560.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.45 : 2,431.82 = 1,560.78 : x
2. Step 2: Convert to fraction form
   1,764.45/2,431.82 = 1,560.78/x
3. Step 3: Cross multiply
   1,764.45x = 2,431.82 × 1,560.78
4. Step 4: Simplify right side
   1,764.45x = 3,795,528.22
5. Step 5: Solve for x
   x = 3,795,528.22/1,764.45
6. Step 6: Final answer
   x = 2,151.11