Finding the Fourth Proportional to 19,915.28, 29,891.38 and 10,061.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,915.28 : 29,891.38 = 10,061.50 : x
2. Step 2: Convert to fraction form
   19,915.28/29,891.38 = 10,061.50/x
3. Step 3: Cross multiply
   19,915.28x = 29,891.38 × 10,061.50
4. Step 4: Simplify right side
   19,915.28x = 300,752,119.87
5. Step 5: Solve for x
   x = 300,752,119.87/19,915.28
6. Step 6: Final answer
   x = 15,101.58