Finding the Fourth Proportional to 9,190.62, 13,787.88 and 5,243.78

Step by Step Solution

1. Step 1: Write the proportion equation
   9,190.62 : 13,787.88 = 5,243.78 : x
2. Step 2: Convert to fraction form
   9,190.62/13,787.88 = 5,243.78/x
3. Step 3: Cross multiply
   9,190.62x = 13,787.88 × 5,243.78
4. Step 4: Simplify right side
   9,190.62x = 72,300,540.45
5. Step 5: Solve for x
   x = 72,300,540.45/9,190.62
6. Step 6: Final answer
   x = 7,866.78