Finding the Fourth Proportional to 13,779.56, 19,016.22 and 7,811

Step by Step Solution

1. Step 1: Write the proportion equation
   13,779.56 : 19,016.22 = 7,811 : x
2. Step 2: Convert to fraction form
   13,779.56/19,016.22 = 7,811/x
3. Step 3: Cross multiply
   13,779.56x = 19,016.22 × 7,811
4. Step 4: Simplify right side
   13,779.56x = 148,535,694.42
5. Step 5: Solve for x
   x = 148,535,694.42/13,779.56
6. Step 6: Final answer
   x = 10,779.42