Finding the Fourth Proportional to 7,978.48, 11,010.54 and 4,621.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.48 : 11,010.54 = 4,621.30 : x
2. Step 2: Convert to fraction form
   7,978.48/11,010.54 = 4,621.30/x
3. Step 3: Cross multiply
   7,978.48x = 11,010.54 × 4,621.30
4. Step 4: Simplify right side
   7,978.48x = 50,883,008.50
5. Step 5: Solve for x
   x = 50,883,008.50/7,978.48
6. Step 6: Final answer
   x = 6,377.53