Finding the Fourth Proportional to 10,670.34, 15,928.50 and 10,191.06

Step by Step Solution

1. Step 1: Write the proportion equation
   10,670.34 : 15,928.50 = 10,191.06 : x
2. Step 2: Convert to fraction form
   10,670.34/15,928.50 = 10,191.06/x
3. Step 3: Cross multiply
   10,670.34x = 15,928.50 × 10,191.06
4. Step 4: Simplify right side
   10,670.34x = 162,328,299.21
5. Step 5: Solve for x
   x = 162,328,299.21/10,670.34
6. Step 6: Final answer
   x = 15,213.04