Finding the Fourth Proportional to 10,015.86, 13,805.96 and 7,888.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,015.86 : 13,805.96 = 7,888.02 : x
2. Step 2: Convert to fraction form
   10,015.86/13,805.96 = 7,888.02/x
3. Step 3: Cross multiply
   10,015.86x = 13,805.96 × 7,888.02
4. Step 4: Simplify right side
   10,015.86x = 108,901,688.60
5. Step 5: Solve for x
   x = 108,901,688.60/10,015.86
6. Step 6: Final answer
   x = 10,872.92