Finding the Fourth Proportional to 10,573.79, 15,867.98 and 10,491.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,573.79 : 15,867.98 = 10,491.78 : x
2. Step 2: Convert to fraction form
   10,573.79/15,867.98 = 10,491.78/x
3. Step 3: Cross multiply
   10,573.79x = 15,867.98 × 10,491.78
4. Step 4: Simplify right side
   10,573.79x = 166,483,302.75
5. Step 5: Solve for x
   x = 166,483,302.75/10,573.79
6. Step 6: Final answer
   x = 15,744.91