Finding the Fourth Proportional to 20,618.57, 28,460.48 and 14,667.50

Step by Step Solution

1. Step 1: Write the proportion equation
   20,618.57 : 28,460.48 = 14,667.50 : x
2. Step 2: Convert to fraction form
   20,618.57/28,460.48 = 14,667.50/x
3. Step 3: Cross multiply
   20,618.57x = 28,460.48 × 14,667.50
4. Step 4: Simplify right side
   20,618.57x = 417,443,874.76
5. Step 5: Solve for x
   x = 417,443,874.76/20,618.57
6. Step 6: Final answer
   x = 20,246.02