Finding the Fourth Proportional to 20,396.51, 30,588.89 and 5,605.91

Step by Step Solution

1. Step 1: Write the proportion equation
   20,396.51 : 30,588.89 = 5,605.91 : x
2. Step 2: Convert to fraction form
   20,396.51/30,588.89 = 5,605.91/x
3. Step 3: Cross multiply
   20,396.51x = 30,588.89 × 5,605.91
4. Step 4: Simplify right side
   20,396.51x = 171,478,536.31
5. Step 5: Solve for x
   x = 171,478,536.31/20,396.51
6. Step 6: Final answer
   x = 8,407.25