Finding the Fourth Proportional to 19,783.13, 27,300.59 and 10,830.78

Step by Step Solution

1. Step 1: Write the proportion equation
   19,783.13 : 27,300.59 = 10,830.78 : x
2. Step 2: Convert to fraction form
   19,783.13/27,300.59 = 10,830.78/x
3. Step 3: Cross multiply
   19,783.13x = 27,300.59 × 10,830.78
4. Step 4: Simplify right side
   19,783.13x = 295,686,711.80
5. Step 5: Solve for x
   x = 295,686,711.80/19,783.13
6. Step 6: Final answer
   x = 14,946.41