Finding the Fourth Proportional to 1,786.95, 2,669.53 and 1,422.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,786.95 : 2,669.53 = 1,422.15 : x
2. Step 2: Convert to fraction form
   1,786.95/2,669.53 = 1,422.15/x
3. Step 3: Cross multiply
   1,786.95x = 2,669.53 × 1,422.15
4. Step 4: Simplify right side
   1,786.95x = 3,796,468.53
5. Step 5: Solve for x
   x = 3,796,468.53/1,786.95
6. Step 6: Final answer
   x = 2,124.55