Finding the Fourth Proportional to 31,449.30, 43,420.77 and 19,530.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,449.30 : 43,420.77 = 19,530.42 : x
2. Step 2: Convert to fraction form
   31,449.30/43,420.77 = 19,530.42/x
3. Step 3: Cross multiply
   31,449.30x = 43,420.77 × 19,530.42
4. Step 4: Simplify right side
   31,449.30x = 848,025,874.82
5. Step 5: Solve for x
   x = 848,025,874.82/31,449.30
6. Step 6: Final answer
   x = 26,964.86