Finding the Fourth Proportional to 28,499.61, 42,744.42 and 7,718.25

Step by Step Solution

1. Step 1: Write the proportion equation
   28,499.61 : 42,744.42 = 7,718.25 : x
2. Step 2: Convert to fraction form
   28,499.61/42,744.42 = 7,718.25/x
3. Step 3: Cross multiply
   28,499.61x = 42,744.42 × 7,718.25
4. Step 4: Simplify right side
   28,499.61x = 329,912,119.67
5. Step 5: Solve for x
   x = 329,912,119.67/28,499.61
6. Step 6: Final answer
   x = 11,576.02