Finding the Fourth Proportional to 10,287.32, 15,343.21 and 10,109.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,287.32 : 15,343.21 = 10,109.60 : x
2. Step 2: Convert to fraction form
   10,287.32/15,343.21 = 10,109.60/x
3. Step 3: Cross multiply
   10,287.32x = 15,343.21 × 10,109.60
4. Step 4: Simplify right side
   10,287.32x = 155,113,715.82
5. Step 5: Solve for x
   x = 155,113,715.82/10,287.32
6. Step 6: Final answer
   x = 15,078.15