Finding the Fourth Proportional to 9,880.00, 13,634.78 and 5,631.73

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.00 : 13,634.78 = 5,631.73 : x
2. Step 2: Convert to fraction form
   9,880.00/13,634.78 = 5,631.73/x
3. Step 3: Cross multiply
   9,880.00x = 13,634.78 × 5,631.73
4. Step 4: Simplify right side
   9,880.00x = 76,787,337.32
5. Step 5: Solve for x
   x = 76,787,337.32/9,880.00
6. Step 6: Final answer
   x = 7,772.00