Finding the Fourth Proportional to 10,575.48, 14,560.95 and 8,978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   10,575.48 : 14,560.95 = 8,978.79 : x
2. Step 2: Convert to fraction form
   10,575.48/14,560.95 = 8,978.79/x
3. Step 3: Cross multiply
   10,575.48x = 14,560.95 × 8,978.79
4. Step 4: Simplify right side
   10,575.48x = 130,739,712.25
5. Step 5: Solve for x
   x = 130,739,712.25/10,575.48
6. Step 6: Final answer
   x = 12,362.53