Finding the Fourth Proportional to 10,612.17, 15,912.78 and 7,285.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.17 : 15,912.78 = 7,285.50 : x
2. Step 2: Convert to fraction form
   10,612.17/15,912.78 = 7,285.50/x
3. Step 3: Cross multiply
   10,612.17x = 15,912.78 × 7,285.50
4. Step 4: Simplify right side
   10,612.17x = 115,932,558.69
5. Step 5: Solve for x
   x = 115,932,558.69/10,612.17
6. Step 6: Final answer
   x = 10,924.49