Finding the Fourth Proportional to 72,963.27, 109,436.73 and 19,659.21

Step by Step Solution

1. Step 1: Write the proportion equation
   72,963.27 : 109,436.73 = 19,659.21 : x
2. Step 2: Convert to fraction form
   72,963.27/109,436.73 = 19,659.21/x
3. Step 3: Cross multiply
   72,963.27x = 109,436.73 × 19,659.21
4. Step 4: Simplify right side
   72,963.27x = 2,151,439,656.78
5. Step 5: Solve for x
   x = 2,151,439,656.78/72,963.27
6. Step 6: Final answer
   x = 29,486.61