Finding the Fourth Proportional to 10,507.89, 15,766.71 and 4,272.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,507.89 : 15,766.71 = 4,272.18 : x
2. Step 2: Convert to fraction form
   10,507.89/15,766.71 = 4,272.18/x
3. Step 3: Cross multiply
   10,507.89x = 15,766.71 × 4,272.18
4. Step 4: Simplify right side
   10,507.89x = 67,358,223.13
5. Step 5: Solve for x
   x = 67,358,223.13/10,507.89
6. Step 6: Final answer
   x = 6,410.25