Finding the Fourth Proportional to 19,157.31, 28,738.67 and 7,310.25

Step by Step Solution

1. Step 1: Write the proportion equation
   19,157.31 : 28,738.67 = 7,310.25 : x
2. Step 2: Convert to fraction form
   19,157.31/28,738.67 = 7,310.25/x
3. Step 3: Cross multiply
   19,157.31x = 28,738.67 × 7,310.25
4. Step 4: Simplify right side
   19,157.31x = 210,086,825.82
5. Step 5: Solve for x
   x = 210,086,825.82/19,157.31
6. Step 6: Final answer
   x = 10,966.41