Finding the Fourth Proportional to 10,816.50, 14,929.80 and 7,238.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,816.50 : 14,929.80 = 7,238.34 : x
2. Step 2: Convert to fraction form
   10,816.50/14,929.80 = 7,238.34/x
3. Step 3: Cross multiply
   10,816.50x = 14,929.80 × 7,238.34
4. Step 4: Simplify right side
   10,816.50x = 108,066,968.53
5. Step 5: Solve for x
   x = 108,066,968.53/10,816.50
6. Step 6: Final answer
   x = 9,990.94