Finding the Fourth Proportional to 72,411.58, 108,616.69 and 19,820.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,411.58 : 108,616.69 = 19,820.98 : x
2. Step 2: Convert to fraction form
   72,411.58/108,616.69 = 19,820.98/x
3. Step 3: Cross multiply
   72,411.58x = 108,616.69 × 19,820.98
4. Step 4: Simplify right side
   72,411.58x = 2,152,889,240.16
5. Step 5: Solve for x
   x = 2,152,889,240.16/72,411.58
6. Step 6: Final answer
   x = 29,731.28