Finding the Fourth Proportional to 9,920.04, 14,880.93 and 3,680.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,920.04 : 14,880.93 = 3,680.12 : x
2. Step 2: Convert to fraction form
   9,920.04/14,880.93 = 3,680.12/x
3. Step 3: Cross multiply
   9,920.04x = 14,880.93 × 3,680.12
4. Step 4: Simplify right side
   9,920.04x = 54,763,603.31
5. Step 5: Solve for x
   x = 54,763,603.31/9,920.04
6. Step 6: Final answer
   x = 5,520.50