Finding the Fourth Proportional to 12,904.50, 19,359.99 and 3,670.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904.50 : 19,359.99 = 3,670.50 : x
2. Step 2: Convert to fraction form
   12,904.50/19,359.99 = 3,670.50/x
3. Step 3: Cross multiply
   12,904.50x = 19,359.99 × 3,670.50
4. Step 4: Simplify right side
   12,904.50x = 71,060,843.30
5. Step 5: Solve for x
   x = 71,060,843.30/12,904.50
6. Step 6: Final answer
   x = 5,506.67