Finding the Fourth Proportional to 9,978.81, 14,965.92 and 5,049.51

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.81 : 14,965.92 = 5,049.51 : x
2. Step 2: Convert to fraction form
   9,978.81/14,965.92 = 5,049.51/x
3. Step 3: Cross multiply
   9,978.81x = 14,965.92 × 5,049.51
4. Step 4: Simplify right side
   9,978.81x = 75,570,562.70
5. Step 5: Solve for x
   x = 75,570,562.70/9,978.81
6. Step 6: Final answer
   x = 7,573.10