Finding the Fourth Proportional to 9,987.84, 13,783.88 and 5,740.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.84 : 13,783.88 = 5,740.27 : x
2. Step 2: Convert to fraction form
   9,987.84/13,783.88 = 5,740.27/x
3. Step 3: Cross multiply
   9,987.84x = 13,783.88 × 5,740.27
4. Step 4: Simplify right side
   9,987.84x = 79,123,172.74
5. Step 5: Solve for x
   x = 79,123,172.74/9,987.84
6. Step 6: Final answer
   x = 7,921.95