Finding the Fourth Proportional to 12,078.32, 18,116.67 and 3,312.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,078.32 : 18,116.67 = 3,312.50 : x
2. Step 2: Convert to fraction form
   12,078.32/18,116.67 = 3,312.50/x
3. Step 3: Cross multiply
   12,078.32x = 18,116.67 × 3,312.50
4. Step 4: Simplify right side
   12,078.32x = 60,011,469.38
5. Step 5: Solve for x
   x = 60,011,469.38/12,078.32
6. Step 6: Final answer
   x = 4,968.53