Finding the Fourth Proportional to 20,359.37, 28,097.48 and 12,812.17

Step by Step Solution

1. Step 1: Write the proportion equation
   20,359.37 : 28,097.48 = 12,812.17 : x
2. Step 2: Convert to fraction form
   20,359.37/28,097.48 = 12,812.17/x
3. Step 3: Cross multiply
   20,359.37x = 28,097.48 × 12,812.17
4. Step 4: Simplify right side
   20,359.37x = 359,989,533.83
5. Step 5: Solve for x
   x = 359,989,533.83/20,359.37
6. Step 6: Final answer
   x = 17,681.77