Finding the Fourth Proportional to 1,425.65, 1,967.42 and 787.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.65 : 1,967.42 = 787.59 : x
2. Step 2: Convert to fraction form
   1,425.65/1,967.42 = 787.59/x
3. Step 3: Cross multiply
   1,425.65x = 1,967.42 × 787.59
4. Step 4: Simplify right side
   1,425.65x = 1,549,512.45
5. Step 5: Solve for x
   x = 1,549,512.45/1,425.65
6. Step 6: Final answer
   x = 1,086.88