Finding the Fourth Proportional to 72,111.57, 108,167.43 and 18,803.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,111.57 : 108,167.43 = 18,803.50 : x
2. Step 2: Convert to fraction form
   72,111.57/108,167.43 = 18,803.50/x
3. Step 3: Cross multiply
   72,111.57x = 108,167.43 × 18,803.50
4. Step 4: Simplify right side
   72,111.57x = 2,033,926,678.54
5. Step 5: Solve for x
   x = 2,033,926,678.54/72,111.57
6. Step 6: Final answer
   x = 28,205.27