Finding the Fourth Proportional to 72,409.90, 108,614.91 and 19,819.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,409.90 : 108,614.91 = 19,819.82 : x
2. Step 2: Convert to fraction form
   72,409.90/108,614.91 = 19,819.82/x
3. Step 3: Cross multiply
   72,409.90x = 108,614.91 × 19,819.82
4. Step 4: Simplify right side
   72,409.90x = 2,152,727,965.52
5. Step 5: Solve for x
   x = 2,152,727,965.52/72,409.90
6. Step 6: Final answer
   x = 29,729.75