Finding the Fourth Proportional to 10,663.86, 14,716.80 and 7,072.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,663.86 : 14,716.80 = 7,072.50 : x
2. Step 2: Convert to fraction form
   10,663.86/14,716.80 = 7,072.50/x
3. Step 3: Cross multiply
   10,663.86x = 14,716.80 × 7,072.50
4. Step 4: Simplify right side
   10,663.86x = 104,084,568
5. Step 5: Solve for x
   x = 104,084,568/10,663.86
6. Step 6: Final answer
   x = 9,760.50