Finding the Fourth Proportional to 9,870.71, 13,615.21 and 5,888.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,870.71 : 13,615.21 = 5,888.75 : x
2. Step 2: Convert to fraction form
   9,870.71/13,615.21 = 5,888.75/x
3. Step 3: Cross multiply
   9,870.71x = 13,615.21 × 5,888.75
4. Step 4: Simplify right side
   9,870.71x = 80,176,567.89
5. Step 5: Solve for x
   x = 80,176,567.89/9,870.71
6. Step 6: Final answer
   x = 8,122.67