Finding the Fourth Proportional to 28,757.34, 43,118.15 and 12,108.80

Step by Step Solution

1. Step 1: Write the proportion equation
   28,757.34 : 43,118.15 = 12,108.80 : x
2. Step 2: Convert to fraction form
   28,757.34/43,118.15 = 12,108.80/x
3. Step 3: Cross multiply
   28,757.34x = 43,118.15 × 12,108.80
4. Step 4: Simplify right side
   28,757.34x = 522,109,054.72
5. Step 5: Solve for x
   x = 522,109,054.72/28,757.34
6. Step 6: Final answer
   x = 18,155.68