Finding the Fourth Proportional to 8,312.19, 12,468.06 and 3,380.58

Step by Step Solution

1. Step 1: Write the proportion equation
   8,312.19 : 12,468.06 = 3,380.58 : x
2. Step 2: Convert to fraction form
   8,312.19/12,468.06 = 3,380.58/x
3. Step 3: Cross multiply
   8,312.19x = 12,468.06 × 3,380.58
4. Step 4: Simplify right side
   8,312.19x = 42,149,274.27
5. Step 5: Solve for x
   x = 42,149,274.27/8,312.19
6. Step 6: Final answer
   x = 5,070.78