Finding the Fourth Proportional to 9,978.75, 14,970.67 and 2,959.02

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.75 : 14,970.67 = 2,959.02 : x
2. Step 2: Convert to fraction form
   9,978.75/14,970.67 = 2,959.02/x
3. Step 3: Cross multiply
   9,978.75x = 14,970.67 × 2,959.02
4. Step 4: Simplify right side
   9,978.75x = 44,298,504.55
5. Step 5: Solve for x
   x = 44,298,504.55/9,978.75
6. Step 6: Final answer
   x = 4,439.28