Finding the Fourth Proportional to 19,887.20, 27,443.98 and 10,934.60

Step by Step Solution

1. Step 1: Write the proportion equation
   19,887.20 : 27,443.98 = 10,934.60 : x
2. Step 2: Convert to fraction form
   19,887.20/27,443.98 = 10,934.60/x
3. Step 3: Cross multiply
   19,887.20x = 27,443.98 × 10,934.60
4. Step 4: Simplify right side
   19,887.20x = 300,088,943.71
5. Step 5: Solve for x
   x = 300,088,943.71/19,887.20
6. Step 6: Final answer
   x = 15,089.55