Finding the Fourth Proportional to 9,880.53, 13,636.06 and 5,631.81

Step by Step Solution

1. Step 1: Write the proportion equation
   9,880.53 : 13,636.06 = 5,631.81 : x
2. Step 2: Convert to fraction form
   9,880.53/13,636.06 = 5,631.81/x
3. Step 3: Cross multiply
   9,880.53x = 13,636.06 × 5,631.81
4. Step 4: Simplify right side
   9,880.53x = 76,795,699.07
5. Step 5: Solve for x
   x = 76,795,699.07/9,880.53
6. Step 6: Final answer
   x = 7,772.43