Finding the Fourth Proportional to 10,670.84, 15,929.25 and 10,191.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,670.84 : 15,929.25 = 10,191.56 : x
2. Step 2: Convert to fraction form
   10,670.84/15,929.25 = 10,191.56/x
3. Step 3: Cross multiply
   10,670.84x = 15,929.25 × 10,191.56
4. Step 4: Simplify right side
   10,670.84x = 162,343,856.17
5. Step 5: Solve for x
   x = 162,343,856.17/10,670.84
6. Step 6: Final answer
   x = 15,213.78