Finding the Fourth Proportional to 72,144.32, 108,216.47 and 19,553.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,144.32 : 108,216.47 = 19,553.80 : x
2. Step 2: Convert to fraction form
   72,144.32/108,216.47 = 19,553.80/x
3. Step 3: Cross multiply
   72,144.32x = 108,216.47 × 19,553.80
4. Step 4: Simplify right side
   72,144.32x = 2,116,042,842.78
5. Step 5: Solve for x
   x = 2,116,042,842.78/72,144.32
6. Step 6: Final answer
   x = 29,330.69