Finding the Fourth Proportional to 9,987.92, 13,783.77 and 5,740.35

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.92 : 13,783.77 = 5,740.35 : x
2. Step 2: Convert to fraction form
   9,987.92/13,783.77 = 5,740.35/x
3. Step 3: Cross multiply
   9,987.92x = 13,783.77 × 5,740.35
4. Step 4: Simplify right side
   9,987.92x = 79,123,664.12
5. Step 5: Solve for x
   x = 79,123,664.12/9,987.92
6. Step 6: Final answer
   x = 7,921.94