Finding the Fourth Proportional to 10,788.56, 14,871.30 and 9,884.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,788.56 : 14,871.30 = 9,884.60 : x
2. Step 2: Convert to fraction form
   10,788.56/14,871.30 = 9,884.60/x
3. Step 3: Cross multiply
   10,788.56x = 14,871.30 × 9,884.60
4. Step 4: Simplify right side
   10,788.56x = 146,996,851.98
5. Step 5: Solve for x
   x = 146,996,851.98/10,788.56
6. Step 6: Final answer
   x = 13,625.25