Finding the Fourth Proportional to 10,128.22, 15,187.86 and 4,581.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,128.22 : 15,187.86 = 4,581.34 : x
2. Step 2: Convert to fraction form
   10,128.22/15,187.86 = 4,581.34/x
3. Step 3: Cross multiply
   10,128.22x = 15,187.86 × 4,581.34
4. Step 4: Simplify right side
   10,128.22x = 69,580,750.53
5. Step 5: Solve for x
   x = 69,580,750.53/10,128.22
6. Step 6: Final answer
   x = 6,869.99