Finding the Fourth Proportional to 10,016.86, 13,807.34 and 7,889.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,016.86 : 13,807.34 = 7,889.02 : x
2. Step 2: Convert to fraction form
   10,016.86/13,807.34 = 7,889.02/x
3. Step 3: Cross multiply
   10,016.86x = 13,807.34 × 7,889.02
4. Step 4: Simplify right side
   10,016.86x = 108,926,381.41
5. Step 5: Solve for x
   x = 108,926,381.41/10,016.86
6. Step 6: Final answer
   x = 10,874.30