Finding the Fourth Proportional to 38,784.27, 58,184.79 and 12,491.07

Step by Step Solution

1. Step 1: Write the proportion equation
   38,784.27 : 58,184.79 = 12,491.07 : x
2. Step 2: Convert to fraction form
   38,784.27/58,184.79 = 12,491.07/x
3. Step 3: Cross multiply
   38,784.27x = 58,184.79 × 12,491.07
4. Step 4: Simplify right side
   38,784.27x = 726,790,284.83
5. Step 5: Solve for x
   x = 726,790,284.83/38,784.27
6. Step 6: Final answer
   x = 18,739.31