Finding the Fourth Proportional to 12,809.00, 19,215.80 and 5,792.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.00 : 19,215.80 = 5,792.31 : x
2. Step 2: Convert to fraction form
   12,809.00/19,215.80 = 5,792.31/x
3. Step 3: Cross multiply
   12,809.00x = 19,215.80 × 5,792.31
4. Step 4: Simplify right side
   12,809.00x = 111,303,841.54
5. Step 5: Solve for x
   x = 111,303,841.54/12,809.00
6. Step 6: Final answer
   x = 8,689.51