Finding the Fourth Proportional to 10,815.48, 14,903.22 and 7,978.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,815.48 : 14,903.22 = 7,978.38 : x
2. Step 2: Convert to fraction form
   10,815.48/14,903.22 = 7,978.38/x
3. Step 3: Cross multiply
   10,815.48x = 14,903.22 × 7,978.38
4. Step 4: Simplify right side
   10,815.48x = 118,903,552.38
5. Step 5: Solve for x
   x = 118,903,552.38/10,815.48
6. Step 6: Final answer
   x = 10,993.83