Finding the Fourth Proportional to 82,209.62, 123,314.49 and 19,880.18

Step by Step Solution

1. Step 1: Write the proportion equation
   82,209.62 : 123,314.49 = 19,880.18 : x
2. Step 2: Convert to fraction form
   82,209.62/123,314.49 = 19,880.18/x
3. Step 3: Cross multiply
   82,209.62x = 123,314.49 × 19,880.18
4. Step 4: Simplify right side
   82,209.62x = 2,451,514,257.81
5. Step 5: Solve for x
   x = 2,451,514,257.81/82,209.62
6. Step 6: Final answer
   x = 29,820.28