Finding the Fourth Proportional to 10,742.72, 16,120.45 and 5,812.25

Step by Step Solution

1. Step 1: Write the proportion equation
   10,742.72 : 16,120.45 = 5,812.25 : x
2. Step 2: Convert to fraction form
   10,742.72/16,120.45 = 5,812.25/x
3. Step 3: Cross multiply
   10,742.72x = 16,120.45 × 5,812.25
4. Step 4: Simplify right side
   10,742.72x = 93,696,012.18
5. Step 5: Solve for x
   x = 93,696,012.18/10,742.72
6. Step 6: Final answer
   x = 8,721.82