Finding the Fourth Proportional to 43,086.78, 64,595.31 and 19,376.96

Step by Step Solution

1. Step 1: Write the proportion equation
   43,086.78 : 64,595.31 = 19,376.96 : x
2. Step 2: Convert to fraction form
   43,086.78/64,595.31 = 19,376.96/x
3. Step 3: Cross multiply
   43,086.78x = 64,595.31 × 19,376.96
4. Step 4: Simplify right side
   43,086.78x = 1,251,660,899.55
5. Step 5: Solve for x
   x = 1,251,660,899.55/43,086.78
6. Step 6: Final answer
   x = 29,049.77