Finding the Fourth Proportional to 9,978.65, 14,968.11 and 4,783.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.65 : 14,968.11 = 4,783.31 : x
2. Step 2: Convert to fraction form
   9,978.65/14,968.11 = 4,783.31/x
3. Step 3: Cross multiply
   9,978.65x = 14,968.11 × 4,783.31
4. Step 4: Simplify right side
   9,978.65x = 71,597,035.40
5. Step 5: Solve for x
   x = 71,597,035.40/9,978.65
6. Step 6: Final answer
   x = 7,175.03