Finding the Fourth Proportional to 7,109.49, 10,663.74 and 2,947.95

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.49 : 10,663.74 = 2,947.95 : x
2. Step 2: Convert to fraction form
   7,109.49/10,663.74 = 2,947.95/x
3. Step 3: Cross multiply
   7,109.49x = 10,663.74 × 2,947.95
4. Step 4: Simplify right side
   7,109.49x = 31,436,172.33
5. Step 5: Solve for x
   x = 31,436,172.33/7,109.49
6. Step 6: Final answer
   x = 4,421.72