Finding the Fourth Proportional to 22,369, 30,870.03 and 12,810.64

Step by Step Solution

1. Step 1: Write the proportion equation
   22,369 : 30,870.03 = 12,810.64 : x
2. Step 2: Convert to fraction form
   22,369/30,870.03 = 12,810.64/x
3. Step 3: Cross multiply
   22,369x = 30,870.03 × 12,810.64
4. Step 4: Simplify right side
   22,369x = 395,464,841.12
5. Step 5: Solve for x
   x = 395,464,841.12/22,369
6. Step 6: Final answer
   x = 17,679.15