Finding the Fourth Proportional to 10,984.48, 16,438.43 and 8,987.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,984.48 : 16,438.43 = 8,987.02 : x
2. Step 2: Convert to fraction form
   10,984.48/16,438.43 = 8,987.02/x
3. Step 3: Cross multiply
   10,984.48x = 16,438.43 × 8,987.02
4. Step 4: Simplify right side
   10,984.48x = 147,732,499.18
5. Step 5: Solve for x
   x = 147,732,499.18/10,984.48
6. Step 6: Final answer
   x = 13,449.20