Finding the Fourth Proportional to 7,779.68, 10,727.76 and 5,513.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,779.68 : 10,727.76 = 5,513.12 : x
2. Step 2: Convert to fraction form
   7,779.68/10,727.76 = 5,513.12/x
3. Step 3: Cross multiply
   7,779.68x = 10,727.76 × 5,513.12
4. Step 4: Simplify right side
   7,779.68x = 59,143,428.21
5. Step 5: Solve for x
   x = 59,143,428.21/7,779.68
6. Step 6: Final answer
   x = 7,602.30