Finding the Fourth Proportional to 1,667.88, 2,501.42 and 789.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.88 : 2,501.42 = 789.84 : x
2. Step 2: Convert to fraction form
   1,667.88/2,501.42 = 789.84/x
3. Step 3: Cross multiply
   1,667.88x = 2,501.42 × 789.84
4. Step 4: Simplify right side
   1,667.88x = 1,975,717.62
5. Step 5: Solve for x
   x = 1,975,717.62/1,667.88
6. Step 6: Final answer
   x = 1,184.57