Finding the Fourth Proportional to 10,633.60, 15,978.56 and 5,706.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,633.60 : 15,978.56 = 5,706.88 : x
2. Step 2: Convert to fraction form
   10,633.60/15,978.56 = 5,706.88/x
3. Step 3: Cross multiply
   10,633.60x = 15,978.56 × 5,706.88
4. Step 4: Simplify right side
   10,633.60x = 91,187,724.49
5. Step 5: Solve for x
   x = 91,187,724.49/10,633.60
6. Step 6: Final answer
   x = 8,575.43