Finding the Fourth Proportional to 72,727.76, 109,086.72 and 19,415.72

Step by Step Solution

1. Step 1: Write the proportion equation
   72,727.76 : 109,086.72 = 19,415.72 : x
2. Step 2: Convert to fraction form
   72,727.76/109,086.72 = 19,415.72/x
3. Step 3: Cross multiply
   72,727.76x = 109,086.72 × 19,415.72
4. Step 4: Simplify right side
   72,727.76x = 2,117,997,211.24
5. Step 5: Solve for x
   x = 2,117,997,211.24/72,727.76
6. Step 6: Final answer
   x = 29,122.27