Finding the Fourth Proportional to 10,921.50, 15,071.70 and 5,953.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.50 : 15,071.70 = 5,953.50 : x
2. Step 2: Convert to fraction form
   10,921.50/15,071.70 = 5,953.50/x
3. Step 3: Cross multiply
   10,921.50x = 15,071.70 × 5,953.50
4. Step 4: Simplify right side
   10,921.50x = 89,729,365.95
5. Step 5: Solve for x
   x = 89,729,365.95/10,921.50
6. Step 6: Final answer
   x = 8,215.85