Finding the Fourth Proportional to 12,958.48, 19,434.13 and 5,561.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,958.48 : 19,434.13 = 5,561.30 : x
2. Step 2: Convert to fraction form
   12,958.48/19,434.13 = 5,561.30/x
3. Step 3: Cross multiply
   12,958.48x = 19,434.13 × 5,561.30
4. Step 4: Simplify right side
   12,958.48x = 108,078,962.96
5. Step 5: Solve for x
   x = 108,078,962.96/12,958.48
6. Step 6: Final answer
   x = 8,340.40