Finding the Fourth Proportional to 28,784.03, 43,181.86 and 12,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   28,784.03 : 43,181.86 = 12,144.10 : x
2. Step 2: Convert to fraction form
   28,784.03/43,181.86 = 12,144.10/x
3. Step 3: Cross multiply
   28,784.03x = 43,181.86 × 12,144.10
4. Step 4: Simplify right side
   28,784.03x = 524,404,610.12
5. Step 5: Solve for x
   x = 524,404,610.12/28,784.03
6. Step 6: Final answer
   x = 18,218.60