Finding the Fourth Proportional to 9,971.94, 13,763.28 and 5,725.88

Step by Step Solution

1. Step 1: Write the proportion equation
   9,971.94 : 13,763.28 = 5,725.88 : x
2. Step 2: Convert to fraction form
   9,971.94/13,763.28 = 5,725.88/x
3. Step 3: Cross multiply
   9,971.94x = 13,763.28 × 5,725.88
4. Step 4: Simplify right side
   9,971.94x = 78,806,889.69
5. Step 5: Solve for x
   x = 78,806,889.69/9,971.94
6. Step 6: Final answer
   x = 7,902.86