Finding the Fourth Proportional to 72,109.76, 108,164.16 and 19,519.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,109.76 : 108,164.16 = 19,519.04 : x
2. Step 2: Convert to fraction form
   72,109.76/108,164.16 = 19,519.04/x
3. Step 3: Cross multiply
   72,109.76x = 108,164.16 × 19,519.04
4. Step 4: Simplify right side
   72,109.76x = 2,111,260,565.61
5. Step 5: Solve for x
   x = 2,111,260,565.61/72,109.76
6. Step 6: Final answer
   x = 29,278.43