Finding the Fourth Proportional to 20,259.30, 30,368.20 and 7,776.09

Step by Step Solution

1. Step 1: Write the proportion equation
   20,259.30 : 30,368.20 = 7,776.09 : x
2. Step 2: Convert to fraction form
   20,259.30/30,368.20 = 7,776.09/x
3. Step 3: Cross multiply
   20,259.30x = 30,368.20 × 7,776.09
4. Step 4: Simplify right side
   20,259.30x = 236,145,856.34
5. Step 5: Solve for x
   x = 236,145,856.34/20,259.30
6. Step 6: Final answer
   x = 11,656.17