Finding the Fourth Proportional to 9,973.88, 13,760.48 and 5,721.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,973.88 : 13,760.48 = 5,721.99 : x
2. Step 2: Convert to fraction form
   9,973.88/13,760.48 = 5,721.99/x
3. Step 3: Cross multiply
   9,973.88x = 13,760.48 × 5,721.99
4. Step 4: Simplify right side
   9,973.88x = 78,737,369.06
5. Step 5: Solve for x
   x = 78,737,369.06/9,973.88
6. Step 6: Final answer
   x = 7,894.35