Finding the Fourth Proportional to 12,709.71, 19,064.41 and 5,211.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,709.71 : 19,064.41 = 5,211.59 : x
2. Step 2: Convert to fraction form
   12,709.71/19,064.41 = 5,211.59/x
3. Step 3: Cross multiply
   12,709.71x = 19,064.41 × 5,211.59
4. Step 4: Simplify right side
   12,709.71x = 99,355,888.51
5. Step 5: Solve for x
   x = 99,355,888.51/12,709.71
6. Step 6: Final answer
   x = 7,817.32