Finding the Fourth Proportional to 12,079.86, 18,116.51 and 3,312.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,079.86 : 18,116.51 = 3,312.69 : x
2. Step 2: Convert to fraction form
   12,079.86/18,116.51 = 3,312.69/x
3. Step 3: Cross multiply
   12,079.86x = 18,116.51 × 3,312.69
4. Step 4: Simplify right side
   12,079.86x = 60,014,364.95
5. Step 5: Solve for x
   x = 60,014,364.95/12,079.86
6. Step 6: Final answer
   x = 4,968.13