Finding the Fourth Proportional to 28,647.12, 42,887.88 and 16,764.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,647.12 : 42,887.88 = 16,764.72 : x
2. Step 2: Convert to fraction form
   28,647.12/42,887.88 = 16,764.72/x
3. Step 3: Cross multiply
   28,647.12x = 42,887.88 × 16,764.72
4. Step 4: Simplify right side
   28,647.12x = 719,003,299.59
5. Step 5: Solve for x
   x = 719,003,299.59/28,647.12
6. Step 6: Final answer
   x = 25,098.62