Finding the Fourth Proportional to 10,870.46, 16,300.16 and 5,315.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,870.46 : 16,300.16 = 5,315.48 : x
2. Step 2: Convert to fraction form
   10,870.46/16,300.16 = 5,315.48/x
3. Step 3: Cross multiply
   10,870.46x = 16,300.16 × 5,315.48
4. Step 4: Simplify right side
   10,870.46x = 86,643,174.48
5. Step 5: Solve for x
   x = 86,643,174.48/10,870.46
6. Step 6: Final answer
   x = 7,970.52