Finding the Fourth Proportional to 72,152.56, 108,234.96 and 18,851.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,152.56 : 108,234.96 = 18,851.60 : x
2. Step 2: Convert to fraction form
   72,152.56/108,234.96 = 18,851.60/x
3. Step 3: Cross multiply
   72,152.56x = 108,234.96 × 18,851.60
4. Step 4: Simplify right side
   72,152.56x = 2,040,402,171.94
5. Step 5: Solve for x
   x = 2,040,402,171.94/72,152.56
6. Step 6: Final answer
   x = 28,279.00