Finding the Fourth Proportional to 21,809.16, 30,095.52 and 12,377.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,809.16 : 30,095.52 = 12,377.52 : x
2. Step 2: Convert to fraction form
   21,809.16/30,095.52 = 12,377.52/x
3. Step 3: Cross multiply
   21,809.16x = 30,095.52 × 12,377.52
4. Step 4: Simplify right side
   21,809.16x = 372,507,900.71
5. Step 5: Solve for x
   x = 372,507,900.71/21,809.16
6. Step 6: Final answer
   x = 17,080.34