Finding the Fourth Proportional to 28,331.73, 42,499.11 and 7,271.96

Step by Step Solution

1. Step 1: Write the proportion equation
   28,331.73 : 42,499.11 = 7,271.96 : x
2. Step 2: Convert to fraction form
   28,331.73/42,499.11 = 7,271.96/x
3. Step 3: Cross multiply
   28,331.73x = 42,499.11 × 7,271.96
4. Step 4: Simplify right side
   28,331.73x = 309,051,615.46
5. Step 5: Solve for x
   x = 309,051,615.46/28,331.73
6. Step 6: Final answer
   x = 10,908.32