Finding the Fourth Proportional to 72,594.42, 108,871.98 and 19,991.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,594.42 : 108,871.98 = 19,991.40 : x
2. Step 2: Convert to fraction form
   72,594.42/108,871.98 = 19,991.40/x
3. Step 3: Cross multiply
   72,594.42x = 108,871.98 × 19,991.40
4. Step 4: Simplify right side
   72,594.42x = 2,176,503,300.97
5. Step 5: Solve for x
   x = 2,176,503,300.97/72,594.42
6. Step 6: Final answer
   x = 29,981.69